cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The quantum cost function concentration dependency on the parametrization expressivity
Creators: name: Friedrich, Lucas
name: Maziero, Jonas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Although we are currently in the era of noisy intermediate scale quantum devices, several studies are being conducted with the aim of bringing machine learning to the quantum domain. Currently, quantum variational circuits are one of the main strategies used to build such models. However, despite its widespread use, we still do not know what are the minimum resources needed to create a quantum machine learning model. In this article, we analyze how the expressiveness of the parametrization affects the cost function. We analytically show that the more expressive the parametrization is, the more the cost function will tend to concentrate around a value that depends both on the chosen observable and on the number of qubits used. For this, we initially obtain a relationship between the expressiveness of the parametrization and the mean value of the cost function. Afterwards, we relate the expressivity of the parametrization with the variance of the cost function. Finally, we show some numerical simulation results that confirm our theoretical-analytical predictions. To the best of our knowledge, this is the first time that these two important aspects of quantum neural networks are explicitly connected.
Purcell enhancement of single-photon emitters in silicon
Creators: name: Gritsch, Andreas
name: Ulanowski, Alexander
name: Reiserer, Andreas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Individual spins that are coupled to telecommunication photons offer unique promise for distributed quantum information processing once a coherent and efficient spin-photon interface can be fabricated at scale. We implement such an interface by integrating erbium dopants into a nanophotonic silicon resonator. We achieve spin-resolved excitation of individual emitters with < 0.1 GHz spectral diffusion linewidth. Upon resonant driving, we observe optical Rabi oscillations and single-photon emission with a 78-fold Purcell enhancement. Our results establish a promising new platform for quantum networks.
Linear ubiquitin chains: enzymes, mechanisms and biology
Creators: name: Rittinger, Katrin
name: Ikeda, Fumiyo
Publisher: name: The Francis Crick Institute
Year: 2021
Subjects: subject: Biochemistry & Proteomics
subject: Signalling & Oncogenes
subject: Structural Biology & Biophysics
subject: Chemical Biology & High Throughput
subject: Infectious Disease
subject: Immunology
subject: FOS: Clinical medicine

description: Ubiquitination is a versatile post-translational modification that regulates a multitude of cellular processes. Its versatility is based on the ability of ubiquitin to form multiple types of polyubiquitin chains, which are recognized by specific ubiquitin receptors to induce the required cellular response. Linear ubiquitin chains are linked through Met 1 and have been established as important players of inflammatory signalling and apoptotic cell death. These chains are generated by a ubiquitin E3 ligase complex called the linear ubiquitin chain assembly complex (LUBAC) that is thus far the only E3 ligase capable of forming linear ubiquitin chains. The complex consists of three subunits, HOIP, HOIL-1L and SHARPIN, each of which have specific roles in the observed biological functions of LUBAC. Furthermore, LUBAC has been found to be associated with OTULIN and CYLD, deubiquitinases that disassemble linear chains and counterbalance the E3 ligase activity of LUBAC. Gene mutations in HOIP, HOIL-1L and OTULIN are found in human patients who suffer from autoimmune diseases, and HOIL-1L mutations are also found in myopathy patients. In this paper, we discuss the mechanisms of linear ubiquitin chain generation and disassembly by their respective enzymes and review our current understanding of their biological functions and association with human diseases.
title: Ιστορικότητα ως παράγοντας για τον σχεδιασμό καταστημάτων-ναυαρχίδων οίκων μόδας με μακρά παράδοση
title: Historicity as an architectural design tool for flagship stores owned by historical fashion houses
Creators: name: Βασο Ιρyνα
Publisher: name: Technical University of Crete
Year: 2020

description: Η εργασία αυτή έχει σκοπό τη διερεύνηση του ρόλου της ιστορικότητας γνωστών οίκων μόδας στην ταυτοτητά τους και το πως αυτός εκφράζεται αρχιτεκτονικά μέσα από τα αντιπροσωπευτικά καταστήματα-ναυαρχίδες τους, που βρίσκονται στα brand zones μητροπόλεων μόδας.
Ως μελέτες περίπτωσης επιλέγονται τα καταστήματα-ναυαρχίδες των γαλλικών οίκων μόδας Louis Vuitton και Dior λόγω της μακράς παράδοσης και σημαντικής απήχισης τους. Ο ρόλος της ιστορικότητας στην ταυτότητα των brands τεκμηριώνεται μέσα από την σύγκριση των αντίστοιχων καταστημάτων στην ιστορική Champs-Elysees στο Παρίσι και την απόλυτα σύγχρονη Omotesando στο Τόκιο.
Το μάρκετινγκ εταιριών ειδών πολυτελείας που βασίζεται στην βιωματική εμπειρία είναι μια αυξανόμενη τάση παγκοσμίως, ειδικά στον χώρο της μόδας. Σκοπός του είναι η ενίσχυση του προϊόντος με ένα σύνολο διαδραστικών εμπειριών που ενεργοποιούν όλες τις αισθήσεις αλλά και την ανθρώπινη επικοινωνία. Από την δεκαετία του 80΄ τα πολυτελή brands μόδας χρησιμοποιούν τη στρατηγική αυτή στα σύγχρονα καταστήματα-ναυαρχίδες τους. Ο παράγοντας της ιστορικότητας καθορίζει πολλές από τις επιλογές τους.  Τα καταστήματα αυτά σχεδιάστηκαν από διάσημους αρχιτέκτονες για να γίνουν οι μακρόβιες αρχιτεκτονικές ενσαρκώσεις αλλά και σύμβολα των οίκων που εκπροσωπούν όπου η ιστορικότητα είναι πρόδηλη.
On the Hadamard product of Hopf monoids
Creators: name: Aguiar, Marcelo
name: Mahajan, Swapneel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Algebra (math.QA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 16T30, 18D35, 20B30, Secondary 18D10, 20F55

description: Combinatorial structures which compose and decompose give rise to Hopf monoids in Joyal's category of species. The Hadamard product of two Hopf monoids is another Hopf monoid. We prove two main results regarding freeness of Hadamard products. The first one states that if one factor is connected and the other is free as a monoid, their Hadamard product is free (and connected). The second provides an explicit basis for the Hadamard product when both factors are free. The first main result is obtained by showing the existence of a one-parameter deformation of the comonoid structure and appealing to a rigidity result of Loday and Ronco which applies when the parameter is set to zero. To obtain the second result, we introduce an operation on species which is intertwined by the free monoid functor with the Hadamard product. As an application of the first result, we deduce that the dimension sequence of a connected Hopf monoid satisfies the following condition: except for the first, all coefficients of the reciprocal of its generating function are nonpositive.
Additional file 1 of A systematic review of the clustering and correlates of physical activity and sedentary behavior among boys and girls
Creators: name: Mello, Gabrielli Thais de
name: Bertuol, Cecília
name: Minatto, Giseli
name: Barbosa Filho, Valter Cordeiro
name: Oldenburg, Brian
name: Leech, Rebecca Maree
name: Silva, Kelly Samara
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1: Table S1. Prisma Checklist. Table S2. SWiM checklist. Table S3. Eligibility criteria. Table S4. Search of all strategy. Table S5. Adapted version of the Quality Assessment Tool for Quantitative Studies of Effective Public Health Practice Project (EPHPP). Table S6. Assessment of the bias risk of studies. Table S7. Clusters variables details before authors classifications. Figure S1. Instrument used and questionnaires classification according to each behavior. Table S8. Clusters detail.
Evaluating approaches for on-the-fly machine learning interatomic potential for activated mechanisms sampling with the activation-relaxation technique nouveau
Creators: name: Sanscartier, Eugène
name: Saint-Denis, Félix
name: Bolduc, Karl-Étienne
name: Mousseau, Normand
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In the last few years, much efforts have gone into developing universal machine-learning potentials able to describe interactions for a wide range of structures and phases. Yet, as attention turns to more complex materials including alloys, disordered and heterogeneous systems, the challenge of providing reliable description for all possible environment become ever more costly. In this work, we evaluate the benefits of using specific versus general potentials for the study of activated mechanisms in solid-state materials. More specifically, we tests three machine-learning fitting approaches using the moment-tensor potential to reproduce a reference potential when exploring the energy landscape around a vacancy in Stillinger-Weber silicon crystal and silicon-germanium zincblende structure using the activation-relaxation technique nouveau (ARTn). We find that a a targeted on-the-fly approach specific and integrated to ARTn generates the highest precision on the energetic and geometry of activated barriers, while remaining cost-effective. This approach expands the type of problems that can be addressed with high-accuracy ML potentials.
description: The following article has been submitted to/accepted by The Journal of Chemical Physics. After it is published, it will be found at https://pubs.aip.org/aip/jcp
On solvability and integrability of the Rabi model
Creators: name: Moroz, Alexander
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Quasi-exactly solvable Rabi model is investigated within the framework of the Bargmann Hilbert space of analytic functions ${\cal B}$. On applying the theory of orthogonal polynomials, the eigenvalue equation and eigenfunctions are shown to be determined in terms of three systems of monic orthogonal polynomials. The formal Schweber quantization criterion for an energy variable $x$, originally expressed in terms of infinite continued fractions, can be recast in terms of a meromorphic function $F(z) = a_0 + \sum_{k=1}^\infty {\cal M}_k/(z-ξ_k)$ in the complex plane $\mathbb{C}$ with {\em real simple} poles $ξ_k$ and {\em positive} residues ${\cal M}_k$. The zeros of $F(x)$ on the real axis determine the spectrum of the Rabi model. One obtains at once that, on the real axis, (i) $F(x)$ monotonically decreases from $+\infty$ to $-\infty$ between any two of its subsequent poles $ξ_k$ and $ξ_{k+1}$, (ii) there is exactly one zero of $F(x)$ for $x\in (ξ_k,ξ_{k+1})$, and (iii) the spectrum corresponding to the zeros of $F(x)$ does not have any accumulation point. Additionally, one can provide much simpler proof of that the spectrum in each parity eigenspace ${\cal B}_\pm$ is necessarily {\em nondegenerate}. Thereby the calculation of spectra is greatly facilitated. Our results allow us to critically examine recent claims regarding solvability and integrability of the Rabi model.
description: 15 pages, 3 figures, RevTex - a connection with the Charlier polynomials in section 4 established - to appear in Ann. Phys. (N.Y.)
Le domaine du contrôle des concentrations économiques en droit de la concurrence
Creators: name: El Mostafa AMMAS
Publisher: name: Zenodo
Year: 2023

description: Les dernières décennies ont témoigné d'une évolution du droit de la concurrence parallèlement au développement de l'économie mondiale en faveur de la distinction des pratiques anticoncurrentielles frappées d'interdiction, et les opérations de concentration économique soumise à un dispositif de contrôle. Initialement établie par le législateur Américain, cette logique ne tarda pas à imprégner les législations postérieures en matière de concurrence que ce soit aux Etats-Unis, en Europe, ou encore au Maroc. Le droit de la concurrence s'attache à prévenir et à réprimer les multiples pratiques ne relevant pas d'une compétition par les mérites. Si la législation sanctionne les pratiques restrictives de concurrence, comme les ententes illicites ou les abus de domination, tel n'est pas le cas des opérations de concentration d'entreprises qui sont seulement soumises à un contrôle destiné à s'assurer que de telles opérations n'aboutissent à l'institution de monopoles de fait c'est dans cette optique  que le législateur Marocain ne manque pas de réglementer la question de concentrations économique transposant ainsi les grandes lignes des législations comparées en la matière.
Repertorium Hymnologicum, Catalogue des chants, hymnes, proses, séquences, tropes en usage dans l’église latine depuis les origines jusqu’à nos jours par le chanoine Ulisse Chevalier
Creators: name: Rauschen, Gerhard
Publisher: name: Bonner Jahrbücher
Year: 2018

description: Rezension zu: Repertorium Hymnologicum, Catalogue des chants, hymnes, proses, séquences, tropes en usage dans l’église latine depuis les origines jusqu’à nos jours par le chanoine Ulisse Chevalier, tome I., Löwen 1892, 601 Seiten. Gr. 8°.
description: Bonner Jahrbücher, Bd. 95 (1894): Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Electric sail, photonic sail and deorbiting applications of the freely guided photonic blade
Creators: name: Janhunen, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We consider a freely guided photonic blade (FGPB) which is a centrifugally stretched sheet of photonic sail membrane that can be tilted by changing the centre of mass or by other means. The FGPB can be installed at the tip of each main tether of an electric solar wind sail (E-sail) so that one can actively manage the tethers to avoid their mutual collisions and to modify the spin rate of the sail if needed. This enables a more scalable and modular E-sail than the baseline approach where auxiliary tethers are used for collision avoidance. For purely photonic sail applications one can remove the tethers and increase the size of the blades to obtain a novel variant of the heliogyro that can have a significantly higher packing density than the traditional heliogyro. For satellite deorbiting in low Earth orbit (LEO) conditions, analogous designs exist where the E-sail effect is replaced by the negative polarity plasma brake effect and the photonic pressure by atmospheric drag. We conclude that the FGPB appears to be an enabling technique for diverse applications. We also outline a way of demonstrating it on ground and in LEO at low cost.
description: 21 pages, 10 figures, accepted in Acta Astronautica Jul 28 2013
Additional file 1 of The impact of dental care programs on healthcare system and societal outcomes: a scoping review
Creators: name: Ghoneim, Abdulrahman
name: Ebnahmady, Arezoo
name: D’Souza, Violet
name: Parbhakar, Kamini Kaura
name: He, Helen
name: Gerbig, Madeline
name: Singhal, Sonica
name: Quiñonez, Carlos
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Search Strategy.
Study protocol Version 1.0 - October 24th, 2022: "Integration of data in inter and transdisciplinary research: an exploratory study"
Creators: name: Nieto-Sanchez, Claudia
name: Verdonck, Kristien
name: Marchal, Bruno
name: Peeters Grietens, Koen
Publisher: name: figshare
Year: 2022
Subjects: Public health not elsewhere classified

description: This file presents the protocol for a study called "Integration of data in inter and transdisciplinary research: an exploratory study." This protocol was approved by the Institutional Review Board of the Institute of Tropical Medicine (ITM), Antwerp, Belgium on 24 October 2022.
 Introduction: This study is focused on the process of interdisciplinary learning. As a multidimensional construction, interdisciplinary learning is built on the basis of cognitive, emotional, and interactional processes (Boix Mansilla et al., 2015). In this case, we will use the Model of Interdisciplinary Learning (Boix Mansilla, 2017) to study four processes typically involved in intern and transdisciplinary research, specifically:
 • Establishing purpose • Disciplinary exchange • Leveraging integration • Critical thinking
 Aims: With this study, we propose to a) explore the knowledge and expertise existing at ITM in terms of inter- and transdisciplinary, and b) strengthen our capacity to address scientific (conceptual, operational, methodological, technical and ethical) challenges derived from these types of research.
 Methodology:  We will conduct a rapid ethnographic assessment (REA) for the exploratory phase of this study (October 2022 – March 2023). REA is a qualitative research method that emphasizes “rapid collection and dissemination of information useful for key decision making” (Sangaramoorthy & Kroeger, 2020). This exploratory phase will be focused on projects developed within or with participation of the Socio Ecological Health Research Unit (SEHR), previous Medical Anthropological Unit, at ITM.
Generalized curvature tensor and the hypersurfaces of the Hermitian manifold for the class of Kenmotsu type
Creators: name: Abass, Mohammed Y.
name: Abood, Habeeb M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: This paper determined the components of the generalized curvature tensor for the class of Kenmotsu type and established the mentioned class is η-Einstein manifold when the generalized curvature tensor is flat; the converse holds true under suitable conditions. It also introduced the notion of generalized Φ-holomorphic sectional (GΦSH-) curvature tensor and thus found the necessary and sufficient conditions for the class of Kenmotsu type to be of constant GΦSH-curvature. In addition, the notion of Φ-generalized semi-symmetric was introduced and its relationship with the class of Kenmotsu type and η-Einstein manifold established. Furthermore, this paper generalized the notion of the manifold of constant curvature and deduced its relationship with the aforementioned ideas. It finally showed that the class of Kenmotsu type exists as a hypersurface of the Hermitian manifold and derived a relation between the components of the Riemannian curvature tensors of the almost Hermitian manifold and its hypersurfaces.
On $λ-$ Pseudo bi-starlike functions related with Fibonacci numbers
Creators: name: Vijaya, Kaliyappan
name: Murugusundaramoorthy, Gangadharan
name: Güney, Hatun Özlem
Publisher: name: arXiv
Year: 2023
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C45

description: In this paper we define a new subclass $λ$-bi-pseudo-starlike functions of $Σ$ related to shell-like curves connected with Fibonacci numbers and determine the initial Taylor-Maclaurin coefficients $|a_2|$ and $|a_3|$ for $f\in\mathcal{PSL}_Σ^λ(\tilde{p}(z)).$ Further we determine the Fekete-Szegö result for the function class $\mathcal{PSL}_Σ^λ(\tilde{p}(z))$ and for special cases, corollaries are stated which some of them are new and have not been studied so far.
description: 11. arXiv admin note: text overlap with arXiv:1810.06216 by other authors
Die byzantinischen Zellen-Emails der Sammlung Swenigorodskoi, ausgestellt im städtischen Suermond-Museum in Aachen. Beschrieben von Joh. Schulz
Creators: name: Vleuten, F. Van
Publisher: name: Bonner Jahrbücher
Year: 2018

description: Rezension zu: Die byzantinischen Zellen-Emails der Sammlung Swenigorodskoi, ausgestellt im städtischen Suermond-Museum in Aachen. Beschrieben von Joh. Schulz, Kaplan zu St. Adalbert. Mit 14 Lichtdrucken. Aachen 1884. Verlag von R. Barth.
description: Bonner Jahrbücher, Bd. 78 (1884): Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
SSHRC Brown Bag Lunch - The Outputs and Impacts of Social Sciences and Humanities Research
Creators: name: Archambault, Éric
Publisher: name: Science-Metrix
Year: 2010
Subjects: survey
bibliometrics
research impacts
social sciences and humanities
0000-0002-4422-1054
scientometrics

description: This brown bag lunch organized by SSHRC in April 2010 discusses the outputs of SSH research and mechanisms used to disseminate them. It Identifies some of the uses of SSHRC-funded research, as well as the extent to which impacts are observed and highlight the most frequent types of impacts and where they occur. Furthermore, it mentions factors that may lead to increased use and impact of SSH research, in the academic sector and the non-academic sector. These may help predict impacts or design programs to increase the certain types of impact. Finally, it uses survey data to test and validate assumptions.
Integration of data in inter and transdisciplinary research: an exploratory study
Creators: name: Nieto-Sanchez, Claudia
name: Verdonck, Kristien
name: Marchal, Bruno
name: Peeters Grietens, Koen
Publisher: name: figshare
Year: 2022
Subjects: Public health not elsewhere classified

description: This file presents the protocol for a study called "Integration of data in inter and transdisciplinary research: an exploratory study." This protocol was approved by the Institutional Review Board of the Institute of Tropical Medicine (ITM), Antwerp, Belgium on 24 October 2022.
 Introduction: This study is focused on the process of interdisciplinary learning. As a multidimensional construction, interdisciplinary learning is built on the basis of cognitive, emotional, and interactional processes (Boix Mansilla et al., 2015) facilitating or limiting the possibilities of integration proposed in a given study. In this case, we will use the Model of Interdisciplinary Learning (Boix Mansilla, 2017) to study four processes typically involved in intern and transdisciplinary research, specifically:
 • Establishing purpose • Disciplinary exchange • Leveraging integration • Critical stance
 Aims: With this study, we propose to a) explore the knowledge and expertise existing at ITM in terms of inter- and transdisciplinary, and b) strengthen our capacity to address scientific (conceptual, operational, methodological, technical and ethical) challenges derived from these types of research.
 Methodology: We will conduct a rapid ethnographic assessment (REA) for the exploratory phase of this study (October 2022 – March 2023). REA is a qualitative research method that emphasizes “rapid collection and dissemination of information useful for key decision making” (Sangaramoorthy & Kroeger, 2020). This exploratory phase will be focused on projects developed within or with participation of the Socio Ecological Health Research Unit (SEHR), previous Medical Anthropological Unit, at ITM.
Additional file 2 of The impact of dental care programs on healthcare system and societal outcomes: a scoping review
Creators: name: Ghoneim, Abdulrahman
name: Ebnahmady, Arezoo
name: D’Souza, Violet
name: Parbhakar, Kamini Kaura
name: He, Helen
name: Gerbig, Madeline
name: Singhal, Sonica
name: Quiñonez, Carlos
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2. Quality assessment tool.
On the occurrence of buoyancy-induced oscillatory growth instability in directional solidification of alloys
Creators: name: Barbera, Josep Maria
name: Isensee, Thomas
name: Tourret, Damien
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent solidification experiments identified an oscillatory growth instability during directional solidification of Ni-based superalloy CMSX4 under a given range of cooling rates. From a modeling perspective, the quantitative simulation of dendritic growth under convective conditions remains challenging, due to the multiple length scales involved. Using the dendritic needle network (DNN) model, coupled with an efficient Navier-Stokes solver, we reproduced the buoyancy-induced growth oscillations observed in CMSX4 directional solidification. These previous results have shown that, for a given alloy and temperature gradient, oscillations occur in a narrow range of cooling rates (or pulling velocity, $V_p$) and that the selected primary dendrite arm spacing ($Λ$) plays a crucial role in the activation of the flow leading to oscillations. Here, we show that the oscillatory behavior may be generalized to other binary alloys within an appropriate range of $(V_p,Λ)$ by reproducing it for an Al-4at.%Cu alloy. We perform a mapping of oscillatory states as a function of $V_p$ and $Λ$, and identify the regions of occurrence of different behaviors (e.g., sustained or damped oscillations) and their effect on the oscillation characteristics. Our results suggest a minimum of $V_p$ for the occurrence of oscillations and confirm the correlation between the oscillation type (namely: damped, sustained, or noisy) with the ratio of average fluid velocity $\overline V$ over $V_p$. We describe the different observed growth regimes and highlight similarities and contrasts with our previous results for a CMSX4 alloy.
Regge-Wheeler equation, linear stability, and greybody factors for dirty black holes
Creators: name: Boonserm, Petarpa
name: Ngampitipan, Tritos
name: Visser, Matt
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: So-called "dirty" black holes are those surrounded by non-zero stress-energy, rather than vacuum. The presence of the non-zero stress-energy modifies key features of the black hole, such as the surface gravity, Regge-Wheeler equation, linear stability, and greybody factors in a rather nontrivial way. Working within the inverse-Cowling approximation, (effectively the test-field limit), we shall present general forms for the Regge-Wheeler equation for linearized spin 0, spin 1, and axial spin 2 perturbations on an arbitrary static spherically symmetric background spacetime. Using very general features of the background spacetime, (in particular the classical energy conditions for the stress-energy surrounding the black hole), we extract several interesting and robust bounds on the behaviour of such systems, including rigorous bounds on the greybody factors for dirty black holes.
description: V1: 4 pages. V2: two minor typos fixed. V3: Slight change in title to emphasise linear stability; now 5 pages; additional discussion to make clearer the role of the inverse-Cowling approximation; references updated. This version accepted for publication in Physical Review D as a Rapid Communication. V4: minor typos fixed. Published version
Phase-Field Study of Polycrystalline Growth and Texture Selection During Melt Pool Solidification
Creators: name: Tavakoli, Rouhollah
name: Tourret, Damien
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Grain growth competition during solidification determines microstructural features, such as dendritic arm spacings, segregation pattern, and grain texture, which have a key impact on the final mechanical properties. During metal additive manufacturing (AM), these features are highly sensitive to manufacturing conditions, such as laser power and scanning speed. The melt pool (MP) geometry is also expected to have a strong influence on microstructure selection. Here, taking advantage of a computationally efficient multi-GPU implementation of a quantitative phase-field model, we use two-dimensional cross-section simulations of a shrinking MP during metal AM, at the scale of the full MP, in order to explore the resulting mechanisms of grain growth competition and texture selection. We explore MPs of different aspect ratios, different initial (substrate) grain densities, and repeat each simulation several times with different random grain distributions and orientations along the fusion line in order to obtain a statistically relevant picture of grain texture selection mechanisms. Our results show a transition from a weak to a strong $\langle10\rangle$ texture when the aspect ratio of the melt pool deviates from unity. This is attributed to the shape and directions of thermal gradients during solidification, and seems more pronounced in the case of wide melt pools than in the case of a deeper one. The texture transition was not found to notably depend upon the initial grain density along the fusion line from which the melt pool solidifies epitaxially.
Additional file 3 of The impact of dental care programs on healthcare system and societal outcomes: a scoping review
Creators: name: Ghoneim, Abdulrahman
name: Ebnahmady, Arezoo
name: D’Souza, Violet
name: Parbhakar, Kamini Kaura
name: He, Helen
name: Gerbig, Madeline
name: Singhal, Sonica
name: Quiñonez, Carlos
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 3. Outcome effectiveness.
Cuál es mayor perfección, hermosura o discreción?
Creators: name: Casariego Castiñeira, Paula
Publisher: name: Zenodo
Year: 2021
Subjects: Calderón
¿Cuál es mayor perfección, hermosura o discreción?
Métrica dramática
Segmentación dramática
Bibliografía

description: Calderón Digital: base de datos, argumentos y motivos del teatro de Calderón (dir. Fausta Antonucci). Ficha dedicada a ¿Cuál es mayor perfección, hermosura o discreción?, con datos bibliográficos primarios y secundarios, fecha probable de composición, cómputo de las formas métricas, análisis de las coordenadas espacio-temporales, adscripción genérica y sinopsis argumental detallada, con indicación de los principales motivos (diegéticos y simbólicos) y propuesta de segmentación articulada según los cambios de forma métrica, de espacio y tiempo dramáticos.
Gauge theories with non-trivial boundary conditions: Black holes
Creators: name: Cheng, Peng
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the partition function and entropy of U(1) gauge theories with multiple boundaries on the black holes background. The nontrivial boundary conditions allow residual zero longitudinal momentum modes and Wilson lines stretched between boundaries. Topological modes of the Wilson lines and other modes are also analyzed in this paper. We study the behavior of the partition function of the theory in different temperature limits, and find the transitions of dominances of different modes as we vary the temperature. Moreover, we find two different area contributions plus logarithm corrections in the entropy. One being part of the bulk fluctuation modes can be seen for finite-temperature black holes, and the other coming from vacuum degeneracy can only be seen in the superlow temperature limit. We have confirmed the mechanism and entropy found in the superlow temperature limit also persist for extremal black holes. The gauge fluctuation on the black hole background might help us understand some fundamental aspects of quantum gravity related to gauge symmetries.
description: 43 pages, 4 figures, matches the published version in PRD
Beyond Descartes' rule of signs
Creators: name: Kostov, Vladimir Petrov
Publisher: name: arXiv
Year: 2023
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We consider real univariate polynomials with all roots real. Such a polynomial with $c$ sign changes and $p$ sign preservations in the sequence of its coefficients has $c$ positive and $p$ negative roots counted with multiplicity. Suppose that all moduli of roots are distinct; we consider them as ordered on the positive half-axis. We ask the question: If the positions of the sign changes are known, what can the positions of the moduli of negative roots be? We prove several new results which show how far from trivial the answer to this question is.
Fuel Cells Research in Canada and in Other Leading Countries: A Bibliometric Study
Creators: name: Archambault, Éric
name: Côté, Grégoire
Publisher: name: Science-Metrix
Year: 2010
Subjects: bibliometrics
0000-0002-4422-1054
scientometrics

description: • Canada ranks first in the multicriteria ranking of scientific research on fuel cells (first in papers per capita, first in scientific impact).
• Canada follows leading Asian countries (Korea, Japan, Taiwan and China) in terms of research intensity (specialization).
• At the world level, most publications that specify a fuel cell type mention SO or PEM fuel cells but biological fuel cell research is growing steadily.
• Canada is unique in that it occupies the most advantageous position (high impact and high level of specialization) for both SOFCs and PEMFCs.
• At the world level NRC is amongst the top ten governmental organizations and NGOs involved in FC research in terms of scientific output and is the leading scientific research institution in Canada.
• Penn State is the leading university at the world level.
• The most important collaboration hubs in Canada are NRC and UBC although scientific collaboration in Fuel Cell research is generally fragmented and mostly regional.
• Canada occupies the most advantageous position in FC IP with above world average technological impact and specialization.
• Ballard ranks second at the world level for its FC IP portfolio. Ballard ranks 5th for fuel cell papers among firms and also has an excellent scientific impact.
MSSM Interpretations of the LHC Discovery: Light or Heavy Higgs?
Creators: name: Bechtle, P.
name: Heinemeyer, S.
name: Stål, O.
name: Stefaniak, T.
name: Weiglein, G.
name: Zeune, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A Higgs-like particle with a mass of about 126 GeV has been discovered at the LHC. Within the experimental uncertainties, the measured properties of this new state are compatible with those of the Higgs boson in the Standard Model (SM). While not statistically significant at present, the results show some interesting patterns of deviations from the SM predictions, in particular a higher rate in the γγ decay mode observed by ATLAS and CMS, and a somewhat smaller rate in the ττ mode. The LHC discovery is also compatible with the predictions of the Higgs sector of the Minimal Supersymmetric Standard Model (MSSM), interpreting the new state as either the light or the heavy CP-even MSSM Higgs boson. Within the framework of the MSSM with seven free parameters (pMSSM-7), we fit the various rates of cross section times branching ratio as measured by the LHC and Tevatron experiments under the hypotheses of either the light or the heavy CP-even Higgs boson being the new state around 126 GeV, with and without the inclusion of further low-energy observables. We find an overall good quality of the fits, with the best fit points exhibiting an enhancement of the γγrate, as well as a small suppression of the bb and ττ channels with respect to their SM expectations, depending on the details of the fit. For the fits including the whole data set the light CP-even Higgs interpretation in the MSSM results in a higher relative fit probability than the SM fit. On the other hand, we find that the present data also permit the more exotic interpretation in terms of the heavy CP-even MSSM Higgs, which could give rise to experimental signatures of additional Higgs states in the near future.
description: 33 pages, 17 figures
Symmetry of Differential Equations and Quantum Theory
Creators: name: Yerchuck, Dmitri
name: Dovlatova, Alla
name: Alexandrov, Andrey
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The symmetry study of main differential equations of mechanics and electrodynamics has shown, that differential equations, which are invariant under transformations of groups, which are symmetry groups of mathematical numbers (considered within the frames of the number theory) determine the mathematical nature of the quantities, incoming in given equations. It allowed to proof the main postulate of quantum mechanics, consisting in that, that to any mechanical quantity can be set up into the correspondence the Hermitian matrix by quantization. High symmetry of Maxwell equations allows to show, that to quantities, incoming in given equations can be set up into the correspondence the Quaternion (twice-Hermitian) matrix by their quantization. It is concluded, that the equations of the dynamics of mechanical systems are not invariant under transformations of quaternion multiplicative group and, consecuently, direct application of quaternions with usually used basis \{e, i, j, k \} to build the new version of quantum mechanics, which was undertaken in the number of modern publications, is incorrect. It is the consequence of non-abelian character of given group. At the same time we have found the correct ways for the creation of the new versions of quantum mechanics on the quaternion base by means of choice of new bases in quaternion ring, from which can be formed the bases for complex numbers under multiplicative groups of which the equations of the dynamics of mechanical systems are invariant.
description: arXiv admin note: substantial text overlap with arXiv:1102.2619, arXiv:1101.1886
Additional file 4 of The impact of dental care programs on healthcare system and societal outcomes: a scoping review
Creators: name: Ghoneim, Abdulrahman
name: Ebnahmady, Arezoo
name: D’Souza, Violet
name: Parbhakar, Kamini Kaura
name: He, Helen
name: Gerbig, Madeline
name: Singhal, Sonica
name: Quiñonez, Carlos
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 4. Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) Checklist.
Slow epidemic extinction in populations with heterogeneous infection rates
Creators: name: Buono, C.
name: Vazquez, F.
name: Macri, P. A.
name: Braunstein, L. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We explore how heterogeneity in the intensity of interactions between people affects epidemic spreading. For that, we study the susceptible-infected-susceptible model on a complex network, where a link connecting individuals $i$ and $j$ is endowed with an infection rate $β_{ij} = λw_{ij}$ proportional to the intensity of their contact $w_{ij}$, with a distribution $P(w_{ij})$ taken from face-to-face experiments analyzed in Cattuto $et\;al.$ (PLoS ONE 5, e11596, 2010). We find an extremely slow decay of the fraction of infected individuals, for a wide range of the control parameter $λ$. Using a distribution of width $a$ we identify two large regions in the $a-λ$ space with anomalous behaviors, which are reminiscent of rare region effects (Griffiths phases) found in models with quenched disorder. We show that the slow approach to extinction is caused by isolated small groups of highly interacting individuals, which keep epidemic alive for very long times. A mean-field approximation and a percolation approach capture with very good accuracy the absorbing-active transition line for weak (small $a$) and strong (large $a$) disorder, respectively.
Pseudopotentials for high-throughput DFT calculations
Creators: name: Garrity, Kevin F.
name: Bennett, Joseph W.
name: Rabe, Karin M.
name: Vanderbilt, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The increasing use of high-throughput density-functional theory (DFT) calculations in the computational design and optimization of materials requires the availability of a comprehensive set of soft and transferable pseudopotentials. Here we present design criteria and testing results for a new open-source "GBRV" ultrasoft pseudopotential library that has been optimized for use in high-throughput DFT calculations. We benchmark the GBRV potentials, as well as two other pseudopotential sets available in the literature, to all-electron calculations in order to validate their accuracy. The results allow us to draw conclusions about the accuracy of modern pseudopotentials in a variety of chemical environments.
description: 9 pages, 6 figures, Supplementary information at http://www.physics.rutgers.edu/gbrv/psp_supp.pdf
Characterizing Foreground for redshifted 21-cm radiation: 150 MHz GMRT observations
Creators: name: Ghosh, Abhik
name: Prasad, Jayanti
name: Bharadwaj, Somnath
name: Ali, Sk. Saiyad
name: Chengalur, Jayaram N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Foreground removal is a major challenge for detecting the redshifted 21-cm neutral hydrogen (HI) signal from the Epoch of Reionization (EoR). We have used 150 MHz GMRT observations to characterize the statistical properties of the foregrounds in four different fields of view. The measured multi-frequency angular power spectrum C_l(Delta nu) is found to have values in the range 10^4 mK^2 to 2 x 10^4 mK^2 across 700 <= l <= 2 x 10^4 and Delta nu <= 2.5 MHz, which is consistent with model predictions where point sources are the most dominant foreground component. The measured C_l(Delta nu) does not show a smooth Delta nu dependence, which poses a severe difficulty for foreground removal using polynomial fitting. The observational data was used to assess point source subtraction. Considering the brightest source (~ 1 Jy) in each field, we find that the residual artifacts are less than 1.5% in the most sensitive field (FIELD I). We have used FIELD I, which has a rms noise of 1.3 mJy/Beam, to study the properties of the radio source population to a limiting flux of 9 mJy. The differential source count is well fitted with a single power law of slope -1.6. We find there is no evidence for flattening of the source counts towards lower flux densities which suggests that source population is dominated by the classical radio-loud Active Galactic Nucleus (AGN). The diffuse Galactic emission is revealed after the point sources are subtracted out from FIELD I . We find C_l \propto l^{-2.34} for 253 <= l <= 800 which is characteristic of the Galactic synchrotron radiation measured at higher frequencies and larger angular scales. We estimate the fluctuations in the Galactic synchrotron emission to be sqrt{l(l+1)C_l/2 pi} ~ 10 K at l=800 (theta > 10'). The measured C_l is dominated by the residual point sources and artifacts at smaller angular scales where C_l ~ 10^3 mK^2 for l > 800.
description: 22 pages, 17 figures, 5 tables, accepted to MNRAS for publication
title: THE MIDSESSION REVERSAL TASK WITH PIGEONS
title: EFFECTS OF A BRIEF DELAY BETWEEN CHOICE AND REINFORCEMENT
titleType: Subtitle
Creators: name: Halloran, Megan
Publisher: name: University of Kentucky Libraries
Year: 2020

description: During a midsession reversal task, the session begins with a simple simultaneous discrimination in which one stimulus (S1) is correct and the alternate stimulus (S2) is incorrect (S1+/S2-). At the halfway point, the discrimination reverses and S2 becomes the correct choice (S2+/S1-). When choosing optimally, a pigeon should choose S1 until the first trial in which it is not reinforced and then shift to S2 (win-stay/lose-shift). With this task pigeons have been shown to respond suboptimally by anticipating the reversal (anticipatory errors) and continuing to choose S1 after the reversal (perseverative errors). This suboptimal behavior may result from a pigeon’s relative impulsivity due to the immediacy of reinforcement following choice. In other choice tasks, there is evidence that the introduction of a short delay between choice and reinforcement may decrease pigeons’ impulsivity. In the present experiment, a delay was introduced between stimulus selection and reinforcement in the midsession reversal task to assess whether anticipatory and perseverative errors decrease. The results showed a significant difference between the no-delay and delay groups for overall accuracy only during Sessions 11-20, with the no-delay group performing better than the delay group. There was no significant difference in overall accuracy during any other block of ten sessions. These results imply that the insertion of a delay may result in slower learning of this task.
description: Copyright © Megan Ashley Halloran 2020
Cyclicity of the 2-class group of the first Hilbert 2-class field of some number fields
Creators: name: Azizi, A
name: Rezzougui, M
name: Zekhnini, A
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Let $\mathds{k}$ be a real quadratic number field. Denote by $\mathrm{Cl}_2(\mathds{k})$ its $2$-class group and by $\mathds{k}_2^{(1)}$ (resp. $\mathds{k}_2^{(2)}$) its first (resp. second) Hilbert $2$-class field. The aim of this paper is to study, for a real quadratic number field whose discriminant is divisible by one prime number congruent to $3$ modulo 4, the metacyclicity of $G=\mathrm{Gal}(\mathds{k}_2^{(2)}/\mathds{k})$ and the cyclicity of $\mathrm{Gal}(\mathds{k}_2^{(2)}/\mathds{k}_2^{(1)})$ whenever the rank of $\mathrm{Cl}_2(\mathds{k})$ is $2$, and the $4$-rank of $\mathrm{Cl}_2(\mathds{k})$ is $1$.
Quantum Communications Made Easy: Deterministic Models of Bosonic Channels
Creators: name: Smith, Graeme
name: Smolin, John A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Information theory establishes the ultimate limits on performance for noisy communication systems [Shannon48]. An accurate model of a physical communication device must include quantum effects, but typically including these makes the theory intractable. As a result communication capacities are not known, even for transmission between two users connected by an electromagnetic waveguide subject to gaussian noise. Here we present an exactly solvable model of communications with a fully quantum electromagnetic field. This allows us to find explicit expressions for all the point-to-point capacities of a noisy quantum channel, with implications for quantum key distribution, and fiber optical communications. We also develop a theory of quantum communication networks by solving some rudimentary quantum networks for broadcasting and multiple access. When possible, we compare the predictions of our new model with those of the orthodox quantum gaussian model and in all cases we find capacities in agreement to within a constant number of bits. Thus, in the limit of high signal to noise ratios our simple model captures the relevant physics of gaussian models while remaining amenable to detailed analysis,
description: 9 pages, 10 figures