cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Instability of Equilibria for the 2D Euler Equations on the torus
Creators: name: Worthington, Joachim
name: Dullin, Holger R.
name: Marangell, Robert
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider the hydrodynamics of an incompressible fluid on a 2D periodic domain. There exists a family of stationary solutions with vorticity given by $Ω^*=α\cos (\mathbf{p} \cdot \mathbf{x} )+β\sin (\mathbf{p} \cdot \mathbf{x} )$. This situation can be approximated as a structure preserving finite dimensional Hamiltonian system by a truncation introduced by Zeitlin (1990,2005) or by the more standard Galerkin style finite element method. We use these two truncations to analyse the linear stability of these solutions and analytical and numerical results are compared. Following the methods used by Li (2000) the problem is divided into subsystems and we prove that most subsystems are linearly stable. We derive a sufficient condition for a subsystem to be linearly unstable and derive an explicit lower bound for the associated real eigenvalues independent of the truncation size $N$. Then we show that the corresponding eigenvectors are in $\ell^2$. This together with known stability results for the 2D periodic Euler equations allows us to conclude that most of these stationary solutions are nonlinearly unstable. We confirm our results with a numerical computation of the spectrum for a large, finite truncation. Finally we discuss the essential spectrum of the full problem as the limit of the truncated problem.
Unveiling the significance of eigenvectors in diffusing non-hermitian matrices by identifying the underlying Burgers dynamics
Creators: name: Burda, Zdzislaw
name: Grela, Jacek
name: Nowak, Maciej A.
name: Tarnowski, Wojciech
name: Warchoł, Piotr
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Following our recent letter, we study in detail an entry-wise diffusion of non-hermitian complex matrices. We obtain an exact partial differential equation (valid for any matrix size $N$ and arbitrary initial conditions) for evolution of the averaged extended characteristic polynomial. The logarithm of this polynomial has an interpretation of a potential which generates a Burgers dynamics in quaternionic space. The dynamics of the ensemble in the large $N$ is completely determined by the coevolution of the spectral density and a certain eigenvector correlation function. This coevolution is best visible in an electrostatic potential of a quaternionic argument built of two complex variables, the first of which governs standard spectral properties while the second unravels the hidden dynamics of eigenvector correlation function. We obtain general large $N$ formulas for both spectral density and 1-point eigenvector correlation function valid for any initial conditions. We exemplify our studies by solving three examples, and we verify the analytic form of our solutions with numerical simulations.
description: 24 pages, 11 figures
Characterization of the Si/SiO2 interface morphology from quantum oscillations in Fowler–Nordheim tunneling currents
Creators: name: Irene, E. A.
name: McKay, K.K.
name: Poler, J.C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1994

description: As design rules shrink to conform with ULSI device dimensions, gate dielectrics for MOSFET structures are required to be scaled to below ~60A where some properties of the device, such as interface roughness, that are negligible for thicker films become critical. Microroughness at the interface of ultrathin MOS capacitors has been shown to degrade these devices. The present study focuses on the interfacial region of -50A. SiO, on Si, using the quantum oscillations in Fowler-Nordheim tunneling currents as a probe. The oscillations are sensitive to the electron potential and abruptness of the film and interfaces. In particular, inelastic scattering and/or thickness inhomogeneities in the film will reduce the amplitude of the oscillations. We are using the amplitude of the oscillations to examine the degree of microroughness at the interface that results from a pre-oxidation high temperature anneal in an inert ambient containing various amounts of H20. AFM imaging has shown correlations supporting a microroughness induced change in the quantum oscillation amplitudes.
Sonnenfleckenzeichnung Nr. 152.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 30.06.2009, 09:15, erstellt von Andrea Manna
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Vortices in normal part of proximity system
Creators: name: Kogan, V. G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is shown that the order parameter $Δ$ induced in the normal part of superconductor-normal-superconductor proximity system is modulated in the magnetic field differently from vortices in bulk superconductors. Whereas $Δ$ turns zero at vortex centers, the magnetic structure of these vortices differs from that of Abrikosov's.
description: 5 pages, 7 figures
Additional file 1 of EMU: reconfigurable graphical user interfaces for Micro-Manager
Creators: name: Deschamps, Joran
name: Ries, Jonas
Publisher: name: figshare
Year: 2020
Subjects: subject: Computer Software
subject: FOS: Computer and information sciences

description: Additional file 1 UML diagram: ConfigurableMainFrame and ConfigurablePanel. Unified Modeling Language (UML) diagram of the ConfigurableMainFrame and ConfigurablePanel classes. The two abstract classes inherit from the Swing classes JFrame and JPanel, respectively. Additionally, ConfigurableMainFrame implements the ConfigurableFrame interface. As both classes are abstract, their abstract methods must be implemented by developers when creating the ConfigurableMainFrame subclass and ConfigurablePanel subclasses. Each class is represented by a box with three compartments: class name, class variables and class methods. Abstract class and interface names are written in italic. Inheritance relationship between two classes is shown as a solid line with an arrow pointing towards the superclass, while implementation of an interface is shown as a dashed line with an arrowhead pointing to the interface class. Aggregation, or class instances being owned by another class, is shown as a solid line with diamond head. The visibility of member variables and methods is indicated by the following signs: - (private), # (protected) or + (public). The diagram shows all private member variables as well as all non-private member methods. Abstract methods are displayed in italic. Variable and method return types, if applicable, are indicated after a colon. The corresponding Javadoc is available in the EMU source-code [25].
RNA Dynamics from Experimental and Computational Approaches
Creators: name: Bussi, Giovanni
name: Bonomi, Massimiliano
name: Gkeka, Paraskevi
name: Sattler, Michael
name: Al-Hashimi, Hashim M.
name: Auffinger, Pascal
name: Duca, Maria
name: Foricher, Yann
name: Incarnato, Danny
name: Jones, Alisha N.
name: Kirmizialtin, Serdal
name: Krepl, Miroslav
name: Orozco, Modesto
name: Palermo, Giulia
name: Pasquali, Samuela
name: Salmon, Loïc
name: Schwalbe, Harald
name: Westhof, Eric
name: Zacharias, Martin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Biomolecules (q-bio.BM)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Ribonucleic acids (RNA) are unique in that they can store genetic information, replicate and perform catalysis. Importantly, RNA molecules are highly dynamic, and thus determining the ensemble of conformations that they populate is crucial not only to elucidate their biological functions, but also for their potential use as therapeutic targets. Computational and experimental techniques provide complementary views on RNA dynamics, and their integration is fundamental to improve the accuracy of computations and the resolution of experiments. Recent exciting developments in this field, were discussed at the CECAM workshop ``RNA dynamics from experimental and computational approaches'', in Paris, June 26-28, 2023. This report outlines key `take-home' messages that emerged during this workshop from the presentations and discussions.
BEYOND THE EXCEPTIONAL POINT: EXPLORING THE FEATURES OF NON-HERMITIAN PT SYMMETRIC SYSTEMS
Creators: name: Agarwal, Kaustubh Shrikant
Publisher: name: Purdue University Graduate School
Year: 2022
Subjects: Quantum physics not elsewhere classified
Mathematical physics not elsewhere classified

description: Over the past two decades, open systems that are described by a non-Hermitian Hamiltonian have become a subject of intense research. These systems encompass classical wave systems with balanced gain and loss, semi-classical models with mode selective losses, and lossy quantum systems. The rapidly growing research on these systems has mainly focused on the wide range of novel functionalities they demonstrate. In this thesis, I intend to present some intriguing properties of a class of open systems which possess parity (P) and time-reversal (T) symmetry with a theoretical background, accompanied by the experimental platform these are realized on. These systems show distinct regions of broken and unbroken symmetries separated by a special phase boundary in the parameter space. This separating boundary is called the PT-breaking threshold or the PT transition threshold. We investigate non-Hermitian systems in two settings: tight binding lattice models, and electrical circuits, with the help of theoretical and numerical techniques.
 With lattice models, we explore the PT-symmetry breaking threshold in discrete realizations of systems with balanced gain and loss which is determined by the effective coupling between the gain and loss sites. In one-dimensional chains, this threshold is maximum when the two sites are closest to each other or the farthest. We investigate the fate of this threshold in the presence of parallel, strongly coupled, Hermitian (neutral) chains, and find that it is increased by a factor proportional to the number of neutral chains. These results provide a surprising way to engineer the PT threshold in experimentally accessible samples. In another example, we investigate the PT-threshold for a one-dimensional, finite Kitaev chain—a prototype for a p-wave superconductor— in the presence of a single pair of gain and loss potentials as a function of the superconducting order parameter, onsite potential, and the distance between the gain and loss sites. In addition to a robust, non-local threshold, we find a rich phase diagram for the threshold that can be qualitatively understood in terms of the band-structure of the Hermitian Kitaev model. Finally, with electrical circuits, we propose a protocol to study the properties of a PT-symmetric system in a single LC oscillator circuit which is contrary to the notion that these systems require a pair of spatially separated balanced gain and loss elements. With a dynamically tunable LC oscillator with synthetically constructed circuit elements, we demonstrate static and Floquet PT breaking transitions by tracking the energy of the circuit. Distinct from traditional mechanisms to implement gain and loss, our protocol enables parity-time symmetry in a minimal classical system.
High density plasma deposition of device quality silicon nitride. II. Effects of thickness on the electrical properties
Creators: name: Agius, B.
name: Delmotte, F.
name: Hugon, M. C.
name: Irene, E. A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999

description: Dielectric behavior of SiNx films, fabricated by microwave electron cyclotron resonance discharge, has been studied as a function of film thickness on the basis of the current–voltage and the capacitance–voltage characteristics. In the thickness range (20 nm,d,80 nm), the resistivity and the critical field for SiNx were found not to be sensitive to the film thickness ~d! and which was opposite to strong dependence of the dynamic dielectric constant e d on thickness. To explain the e d behavior as a function of d, a model based on trapped space charge effects is proposed. The dominant mode of electronic conduction, determined from J –E1/2 curves and Arrhenius plots of leakage current, appears to be Poole–Frenkel emission only for thicker films (d.20 nm). Finally, the spatial profile of fixed charges reveals that SiNx /Si interface has a much greater concentration of defects than the bulk film.
Zero-temperature entanglement membranes in quantum circuits
Creators: name: Sommers, Grace M.
name: Gopalakrishnan, Sarang
name: Gullans, Michael J.
name: Huse, David A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In chaotic quantum systems, the entanglement of a region $A$ can be described in terms of the surface tension of a spacetime membrane pinned to the boundary of $A$. Here, we interpret the tension of this entanglement membrane in terms of the rate at which information "flows" across it. For any orientation of the membrane, one can define (generically nonunitary) dynamics across the membrane; we explore this dynamics in various space-time translation-invariant (STTI) stabilizer circuits in one and two spatial dimensions. We find that the flux of information across the membrane in these STTI circuits reaches a steady state. In the cases where this dynamics is nonunitary and the steady state flux is nonzero, this occurs because the dynamics across the membrane is unitary in a subspace of extensive entropy. This generalized unitarity is present in a broad class of STTI stabilizer circuits, and is also present in some special non-stabilizer models. The existence of multiple unitary (or generalized unitary) directions forces the entanglement membrane tension to be a piecewise linear function of the orientation of the membrane; in this respect, the entanglement membrane behaves like an interface in a zero-temperature classical lattice model. We argue that entanglement membranes in random stabilizer circuits that produce volume-law entanglement are also effectively at zero temperature.
description: 11 pages, 8 figures + 31 pages, 17 figures. v2: Revised in response to referee comments, close to published version
Report of the Mutual Learning event
Creators: name: Bigey, Gaston
name: Holstein, Philippe
name: Mazella, Fanny
name: Tarnus, Evelyne
name: Quintal, Lúcio
name: Silveira, Lina
name: Weck, Vanessa
Publisher: name: Zenodo
Year: 2019
Subjects: ORs
Outermost Regions
Research
Innovation
Research excellence

description: Report on the Mutual Learning event organized under the workpackage 2, dedicated to the diagnostic of OR's R&I ecosystems and participation in FP. This event aimed at sharing knowledge and experiences among OR on the major obstacles and levers that influence their participation in FP, and at drafting a common vision and roadmap for a joint strategy to increase the participation of ORs in Framework programmes.
Sonnenfleckenzeichnung Nr. 37.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 20.02.2009, 08:15, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 186.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 04.08.2009, 07:45, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Relation Extraction Using Large Language Models: A Case Study on Acupuncture Point Locations
Creators: name: Li, Yiming
name: Peng, Xueqing
name: Li, Jianfu
name: Zuo, Xu
name: Peng, Suyuan
name: Pei, Donghong
name: Tao, Cui
name: Xu, Hua
name: Hong, Na
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In acupuncture therapy, the accurate location of acupoints is essential for its effectiveness. The advanced language understanding capabilities of large language models (LLMs) like Generative Pre-trained Transformers (GPT) present a significant opportunity for extracting relations related to acupoint locations from textual knowledge sources. This study aims to compare the performance of GPT with traditional deep learning models (Long Short-Term Memory (LSTM) and Bidirectional Encoder Representations from Transformers for Biomedical Text Mining (BioBERT)) in extracting acupoint-related location relations and assess the impact of pretraining and fine-tuning on GPT's performance. We utilized the World Health Organization Standard Acupuncture Point Locations in the Western Pacific Region (WHO Standard) as our corpus, which consists of descriptions of 361 acupoints. Five types of relations ('direction_of,' 'distance_of,' 'part_of,' 'near_acupoint,' and 'located_near') (n= 3,174) between acupoints were annotated. Five models were compared: BioBERT, LSTM, pre-trained GPT-3.5, fine-tuned GPT-3.5, as well as pre-trained GPT-4. Performance metrics included micro-average exact match precision, recall, and F1 scores. Our results demonstrate that fine-tuned GPT-3.5 consistently outperformed other models in F1 scores across all relation types. Overall, it achieved the highest micro-average F1 score of 0.92. This study underscores the effectiveness of LLMs like GPT in extracting relations related to acupoint locations, with implications for accurately modeling acupuncture knowledge and promoting standard implementation in acupuncture training and practice. The findings also contribute to advancing informatics applications in traditional and complementary medicine, showcasing the potential of LLMs in natural language processing.
Functoriality of equivariant eta forms
Creators: name: Liu, Bo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58J

description: In this paper, we define the equivariant eta form of Bismut-Cheeger for a compact Lie group and establish a formula about the functoriality of equivariant eta forms with respect to the composition of two submersions.
description: 75 pages
Sonnenfleckenzeichnung Nr. 137.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 15.06.2009, 09:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Epitaxial growth of CoxMnySiz (111) thin films in the compositional range around the Heusler alloy Co2MnSi
Creators: name: Chu, Yong
name: Collins, Brian
name: He, Liang
name: Tsui, Frank
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Epitaxial growth and structural properties of CoxMnySiz thin films on Ge (111) substrates, including the Heusler alloy Co2MnSi (111), have been studied using combinatorial molecular beam epitaxy (MBE) techniques. In situ reflection high energy electron diffraction and ex situ x-ray diffraction experiments show that high quality coherent MBE growth with fcc (111) stacking can be achieved over a relatively large composition space that includes Co2MnSi. The highest structural and chemical ordering is observed near the composition of Co0.63Mn0.14Si0.23 rather than that at the Heusler stoichiometry of Co2MnSi. The in-plane crystallographic axis of the fcc film exhibits a 60° rotation with respect to that of the Ge substrate. The rotation appears to be originated at the film-substrate interface, as a result of the symmetry and stacking of the Ge (111) surface reconstruction.
SrRuO3 under tensile strain: Thickness-dependent electronic and magnetic properties
Creators: name: Wakabayashi, Yuki K.
name: Kobayashi, Masaki
name: Seki, Yuichi
name: Yamagami, Kohei
name: Takeda, Takahito
name: Ohkochi, Takuo
name: Taniyasu, Yoshitaka
name: Krockenberger, Yoshiharu
name: Yamamoto, Hideki
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The burgeoning fields of spintronics and topological electronics require materials possessing a unique combination of properties: ferromagnetism, metallicity, and chemical stability. SrRuO3 (SRO) stands out as a compelling candidate due to its exceptional combination of these attributes. However, understanding its behavior under tensile strain, especially its thickness-dependent changes, remains elusive. This study employs machine-learning-assisted molecular beam epitaxy to investigate SRO films with thicknesses from 1 to 10 nm. This work complements the existing focus on compressive-strained SRO, opening a new avenue for exploring its hitherto concealed potential. Using soft X-ray magnetic circular dichroism, we uncover an intriguing interplay between film thickness, electronic structure, and magnetic properties. Our key findings reveal an intensified localization of Ru 4d t2g-O 2p hybridized states at lower thicknesses, attributed to the weakened orbital hybridization. Furthermore, we find a progressive reduction of magnetic moments for both Ru and O ions as film thickness decreases. Notably, a non-ferromagnetic insulating state emerges at a critical thickness of 1 nm, marking a pivotal transition from the metallic ferromagnetic phase. These insights emphasize the importance of considering thickness-dependent properties when tailoring SRO for next-generation spintronic and topological electronic devices.
Sonnenfleckenzeichnung Nr. 130.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 05.06.2009, 08:45, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Additional file 5 of EMU: reconfigurable graphical user interfaces for Micro-Manager
Creators: name: Deschamps, Joran
name: Ries, Jonas
Publisher: name: figshare
Year: 2020
Subjects: subject: Computer Software
subject: FOS: Computer and information sciences

description: Additional file 5 UML diagram: Setting and subclasses. UML diagram of the abstract Setting class and its subclasses. These classes are instantiated in the ConfigurableMainFrame subclass and their respective member variable value_ is set to a user-defined value using the EMU configuration. Each class is represented by a box with three compartments: class name, class variables and class methods. Abstract class names are written in italic. Parameterized class types are shown in a box on the top right corner of each class. Inheritance relationship between two classes is shown as a solid line with an arrow pointing towards the superclass. The visibility of member variables and methods is indicated by the following signs: - (private), # (protected) or + (public). The diagram shows all private member variables as well as all non-private member methods. Abstract methods are displayed in italic. Variable and method return types, if applicable, are indicated after a colon. The corresponding Javadoc is available in the EMU source-code [25].
Domain Walls and Anchoring Transitions Mimicking Nematic Biaxiality in the Oxadiazole Bent-Core Liquid Crystal C7
Creators: name: Kim, Young-ki
name: Cukrov, Greta
name: Xiang, Jie
name: Shin, Sung-Tae
name: Lavrentovich, Oleg D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the origin of secondary disclinations that were recently described as a new evidence of a biaxial nematic phase in an oxadiazole bent-core thermotropic liquid crystal C7. With an assortment of optical techniques such as polarizing optical microscopy, LC PolScope, and fluorescence confocal polarizing microscopy, we demonstrate that the secondary disclinations represent non-singular domain walls formed in an uniaxial nematic during the surface anchoring transition, in which surface orientation of the director changes from tangential (parallel to the bounding plates) to tilted. Each domain wall separates two regions with the director tilted in opposite azimuthal directions. At the centre of the wall, the director remains parallel to the bonding plates. The domain walls can be easily removed by applying a modest electric field. The anchoring transition is explained by the balance of (a) the intrinsic perpendicular surface anchoring produced by the polyimide aligning layer and (b) tangential alignment caused by ionic impurities forming electric double layers. The model is supported by the fact that the temperature of the tangential-tilted anchoring transition decreases as the cell thickness increases and as the concentration of ionic species (added salt) increases. We also demonstrate that the surface alignment is strongly affected by thermal degradation of the samples. The study shows that C7 exhibits only a uniaxial nematic phase and demonstrate yet another mechanism (formation of secondary disclinations) by which a uniaxial nematic can mimic a biaxial nematic behaviour.
description: 21 pages, 9 Figures, 1 Table
An applied introduction to good practices in preregistration
Creators: name: Schettino, Antonio
name: Van Lissa, Caspar
Publisher: name: Zenodo
Year: 2022
Subjects: open science
Open Science Framework
OSF
preregistration
preregistration-as-code

description: Preregistration is the practice of publishing the plan for a study before the data have been collected or examined. In this workshop, we introduced the practice of preregistration, showed how to preregister a study on the Open Science Framework (OSF), and discussed researcher degrees of freedom. How can you make sure your preregistration is unambiguous? What to do when reality does not turn out exactly the way you preregistered?
FORMATION OF PIANO PERFORMANCE IN RUSSIA
Creators: name: Kamilova, Dilnoz
Publisher: name: Zenodo
Year: 2024

description: This article analyzes the history and development of piano performance in Russia. The article provides information about the introduction of the piano instrument to Russia, its early stages, its development in the classical and romantic periods, the Soviet era in the 20th century, and the current state of modern piano performance. Piano performance in Russia is an integral part of musical culture, and its history, important composers and performers, as well as pedagogical approaches are analyzed. The role of contemporary piano performance in the global music scene and pedagogical innovations are also discussed.
Exotic Haldane Superfluid Phase of Soft-Core Bosons in Optical Lattices
Creators: name: Lv, Jian-Ping
name: Wang, Z. D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose to realize an exotic Haldane superfluid (HSF) phase in an extended Bose-Hubbard model on the two-leg ladder (i.e., a two-species mixture of interacting bosons). The proposal is confirmed by means of large-scale quantum Monte Carlo simulations, with a significant part of the ground-state phase diagram being revealed. Most remarkably, the newly discovered HSF phase features both superfluidity and the non-local topological Haldane order. The effects induced by varying the number of legs are furthermore explored. Our results shed light on how topological superfluid emerges in bosonic systems.
description: 5 pages, 6 figures; accepted for publication in Physical Review B (April 29, 2016)
Sonnenfleckenzeichnung Nr. 294.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.12.2009, 08:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 1.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Extending the Defect Tolerance of Halide Perovskite Nanocrystals to Hot Carrier Cooling Dynamics
Creators: name: Ye, Junzhi
name: Mondal, Navendu
name: Carwithen, Ben P.
name: Zhang, Yunwei
name: Dai, Linjie
name: Fan, Xiangbin
name: Mao, Jian
name: Cui, Zhiqiang
name: Ghosh, Pratyush
name: Martinez, Clara Otero
name: van Turnhout, Lars
name: Yu, Zhongzheng
name: Chen, Ziming
name: Greenham, Neil C.
name: Stranks, Samuel D.
name: Polavarapu, Lakshminarayana
name: Bakulin, Artem
name: Rao, Akshay
name: Hoye, Robert L. Z.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Defect tolerance is a critical enabling factor for efficient lead-halide perovskite materials, but the current understanding is primarily on band-edge (cold) carriers, with significant debate over whether hot carriers (HCs) can also exhibit defect tolerance. Here, this important gap in the field is addressed by investigating how internationally-introduced traps affect HC relaxation in CsPbX3 nanocrystals (X = Br, I, or mixture). Using femtosecond interband and intraband spectroscopy, along with energy-dependent photoluminescence measurements and kinetic modelling, it is found that HCs are not universally defect tolerant in CsPbX3, but are strongly correlated to the defect tolerance of cold carriers, requiring shallow traps to be present (as in CsPbI3). It is found that HCs are directly captured by traps, instead of going through an intermediate cold carrier, and deeper traps cause faster HC cooling, reducing the effects of the hot phonon bottleneck and Auger reheating. This work provides important insights into how defects influence HCs, which will be important for designing materials for hot carrier solar cells, multiexciton generation, and optical gain media.
description: 18 pages, 5 figures
A flexible quantum data bus
Creators: name: Freund, Julia
name: Pirker, Alexander
name: Dür, Wolfgang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider multi-path routing of entanglement in quantum networks, where a pre-prepared multipartite entangled 2D cluster state serves as a resource to perform different tasks on demand. We show how to achieve parallel connections between multiple, freely chosen groups of parties by performing appropriate local measurements among diagonal paths, which preserves the entanglement structure of the remaining state. We demonstrate how to route multiple Bell-states along parallel lines via crossings, turns and fade-in/-outs, analogously to a data bus. The results apply to networks at any scale.
description: 11 pages, 10 figures
Additional file 4 of EMU: reconfigurable graphical user interfaces for Micro-Manager
Creators: name: Deschamps, Joran
name: Ries, Jonas
Publisher: name: figshare
Year: 2020
Subjects: subject: Computer Software
subject: FOS: Computer and information sciences

description: Additional file 4 UML diagram: InternalProperty and subclasses. UML diagram of the abstract InternalProperty class and its subclasses. Internal properties are shared between ConfigurablePanel subclasses, provided that they are of the same type and are given the same label. Each class is represented by a box with three compartments: class name, class variables and class methods. Abstract class names are written in italic. Parameterized class types are shown in a box on the top right corner of each class. Inheritance relationship between two classes is shown as a solid line with an arrow pointing towards the superclass. The visibility of member variables and methods is indicated by the following signs: - (private), # (protected) or + (public). The diagram shows all private member variables as well as all non-private member methods. Abstract methods are displayed in italic. Variable and method return types, if applicable, are indicated after a colon. The corresponding Javadoc is available in the EMU source-code [25].
Sonnenfleckenzeichnung Nr. 277.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 18.11.2009, 08:00, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
On the Linear Extension Complexity of Regular n-gons
Creators: name: Vandaele, Arnaud
name: Gillis, Nicolas
name: Glineur, François
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optimization and Control (math.OC)
subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this paper, we propose new lower and upper bounds on the linear extension complexity of regular $n$-gons. Our bounds are based on the equivalence between the computation of (i) an extended formulation of size $r$ of a polytope $P$, and (ii) a rank-$r$ nonnegative factorization of a slack matrix of the polytope $P$. The lower bound is based on an improved bound for the rectangle covering number (also known as the boolean rank) of the slack matrix of the $n$-gons. The upper bound is a slight improvement of the result of Fiorini, Rothvoss and Tiwary [Extended Formulations for Polygons, Discrete Comput. Geom. 48(3), pp. 658-668, 2012]. The difference with their result is twofold: (i) our proof uses a purely algebraic argument while Fiorini et al. used a geometric argument, and (ii) we improve the base case allowing us to reduce their upper bound $2 \left\lceil \log_2(n) \right\rceil$ by one when $2^{k-1} < n \leq 2^{k-1}+2^{k-2}$ for some integer $k$. We conjecture that this new upper bound is tight, which is suggested by numerical experiments for small $n$. Moreover, this improved upper bound allows us to close the gap with the best known lower bound for certain regular $n$-gons (namely, $9 \leq n \leq 13$ and $21 \leq n \leq 24$) hence allowing for the first time to determine their extension complexity.
description: 20 pages, 3 figures. New contribution: improved lower bound for the boolean rank of the slack matrices of n-gons
Commuting contractive idempotents in measure algebras
Creators: name: Spronk, Nico
Publisher: name: arXiv
Year: 2015
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 43A05, 43A77, 43A40

description: We determine when contractive idempotents in the measure algebra of a locally compact group commute. We consider a dynamical version of the same result. We also look at some properties of groups of measures whose identity is a contactive idempotent.
description: 13 pages
Sonnenfleckenzeichnung Nr. 159.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.07.2009, 09:00, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 185.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.08.2009, 10:00, erstellt von Andrea Manna
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
An asymptotically optimal algorithm for generating bin cardinalities
Creators: name: Devroye, Luc
name: Los, Dimitrios
Publisher: name: arXiv
Year: 2024
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: G.3; G.2.m; F.2.2
subject: 65C10, 60C05, 11K45, 68W20, 68U20, 68W27, 68W40

description: In the balls-into-bins setting, $n$ balls are thrown uniformly at random into $n$ bins. The naïve way to generate the final load vector takes $Θ(n)$ time. However, it is well-known that this load vector has with high probability bin cardinalities of size $Θ(\frac{\log n}{\log \log n})$. Here, we present an algorithm in the RAM model that generates the bin cardinalities of the final load vector in the optimal $Θ(\frac{\log n}{\log \log n})$ time in expectation and with high probability.
 Further, the algorithm that we present is still optimal for any $m \in [n, n \log n]$ balls and can also be used as a building block to efficiently simulate more involved load balancing algorithms. In particular, for the Two-Choice algorithm, which samples two bins in each step and allocates to the least-loaded of the two, we obtain roughly a quadratic speed-up over the naïve simulation.
description: 11 pages
Sonnenfleckenzeichnung Nr. 171.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.07.2009, 10:00, erstellt von Andrea Manna
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2009

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2
Creators: name: Ghimire, N. J.
name: Calder, S.
name: Janoschek, M.
name: Bauer, E. D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have investigated the magnetic ground state of the antiferromagnetic Kondo-lattice compounds CeMAl$_{4}$Si$_{2}$ (M = Rh, Ir) using neutron powder diffraction. Although both of these compounds show two magnetic transitions $T_{N1}$ and $T_{N2}$ in the bulk properties measurements, evidence for magnetic long-range order was only found below the lower transition $T_{N2}$. Analysis of the diffraction profiles reveals a commensurate antiferromagnetic structure with a propagation vector $\mathbf{k}$= (0, 0, 1/2). The magnetic moment in the ordered state of CeRhAl$_{4}$Si$_{2}$ and CeIrAl$_{4}$Si$_{2}$ were determined to be 1.14(2) and 1.41(3) $μ_{B}$/Ce, respectively, and are parallel to the crystallographic $c$-axis in agreement with magnetic susceptibility measurements.
La surveillance à l’écran : l’exploration de l’actualisation d’une théorie de la surveillance et d’un modèle de visibilité dans les films de science-fiction
Creators: name: Bocian, Charlotte
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: surveillance
surveillance studies
surveillant assemblage
panoptique
criminologie culturelle
criminologie culturelle visuelle
films
science-fiction

description: Dans le cadre de ce travail, nous nous intéressons à la surveillance, que nous définissons, suivant les travaux de G.T. Marx, comme étant « l’examen d’individus, de groupes et de contextes grâce à l’usage de moyens techniques pour extraire ou créer de l’information » (Marx, 2015, p. 375, traduit dans Castagnino, 2018, p. 23). La surveillance contemporaine fait l’objet d’une attention particulière en ce qu’une « expansion capitale et une intensification de la surveillance dans presque toutes les sphères institutionnelles de notre existence » (Ball et al., 2012, p. 1, traduit dans Castagnino, pp. 18-19) caractériseraient notre époque. Face à cela, le courant des surveillance studies a vu le jour, afin de dévoiler ces pratiques de surveillance qui, selon eux, sont de nature à favoriser les discriminations, les exclusions, et bien d’autres injustices (Castagnino, 2018). Ce courant s’est longtemps basé sur les analyses de M. Foucault, et particulièrement sur la métaphore panoptique. K.D. Haggerty et R.V. Ericson (2000), cependant, avancent que la métaphore panoptique est insuffisante pour rendre compte de la surveillance contemporaine. Ils ont ainsi développé la théorie du surveillant assemblage pour mieux rendre compte, selon eux, de cette surveillance contemporaine. Les auteurs ne proposent cependant aucune empirie dans leur article pour rendre compte de leurs résultats. Pour cette raison, et afin de vérifier l’actualité du surveillant assemblage (celui-ci ayant été théorisé en 2000), ce travail consiste en une étude empirique visant l’exploration de l’actualisation du surveillant assemblage dans la culture que constituent les films de science-fiction postérieurs à l’an 2000 portant sur la surveillance. Nous procéderons de la même manière pour la métaphore panoptique, afin de donner des éléments de réponse quant à la controverse qui existe autour de la pertinence d’avancer cette métaphore pour rendre compte de la surveillance contemporaine.
EFFECTS OF CONCUSSION HISTORY ON CLINICAL AND TECHNOLOGY-BASED EYE TRACKING MEASURES
Creators: name: Minyard, Katherine
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2021

description: Eye tracking is a growing measure of concussion deficits that provides insight into complications caused by traumatic impacts. Clinical and technology-based eye tracking measures may provide insight into specific complications resulting from previous concussion. The aim of this study was to use a retrospective data analysis to compare clinical eye tracking, particularly saccadic eye movement task performance in college-aged individuals with and without a concussion history, as well as comparing data collected for the Developmental Eye Movement exam (DEM) to currently existing normative values to assess for differences in performance between age groups. We observed that there was no significant difference in performance between groups with and without concussion history, but that a significant difference existed between currently existing normative values for DEM and those collected in our sample. Ultimately our results illustrate the need for establishment of new normative values for adult populations in eye tracking assessments, as well as the need for more data to determine measures for potential long-term deficits of concussion