cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interfacial Effects on Solid Electrolyte Interphase in Lithium-ion Batteries
Creators: name: Ahmad, Zeeshan
name: Venturi, Victor
name: Hafiz, Hasnain
name: Viswanathan, Venkatasubramanian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The existence of passivating layers at the interfaces is a major factor enabling modern lithium-ion (Li-ion) batteries. Their properties determine the cycle life, performance, and safety of batteries. A special case is the solid electrolyte interphase (SEI), a heterogeneous multi-component film formed due to the instability and subsequent decomposition of the electrolyte at the surface of the anode. The SEI acts as a passivating layer that hinders further electrolyte disintegration, which is detrimental to the Coulombic efficiency. In this work, we use first-principles simulations to investigate the kinetic and electronic properties of the interface between lithium fluoride (LiF) and lithium carbonate (Li$_2$CO$_3$), two common SEI components present in Li-ion batteries with organic liquid electrolytes. We find a coherent interface between these components that restricts the strain in each of them to below 3%. We find that the interface causes a large increase in the formation energy of the Frenkel defect, generating Li vacancies in LiF and Li interstitials in Li$_2$CO$_3$ responsible for transport. On the other hand, the Li interstitial hopping barrier is reduced from $0.3$ eV in bulk Li$_2$CO$_3$ to $0.10$ or $0.22$ eV in the interfacial structure considered, demonstrating the favorable role of the interface. Controlling these two effects in a heterogeneous SEI is crucial for maintaining fast ion transport in the SEI. We further perform Car-Parrinello molecular dynamics simulations to explore Li ion conduction in our interfacial structure, which reveal an enhanced Li ion diffusion in the vicinity of the interface. Understanding the interfacial properties of the multiphase SEI represents an important frontier to enable next-generation batteries.
description: 24 + 6 + 1 pages, 7 figures, 6 pages of Supporting Information. v2: more detailed explanation of defective structure, added references etc
Supersymmetry and the Supergravity Landscape
Creators: name: Ortin, Tomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the recent times a lot of effort has been devoted to improve our knowledge about the space of string theory vacua (``the landscape'') to find statistical grounds to justify how and why the theory selects its vacuum. Particularly interesting are those vacua that preserve some supersymmetry, which are always supersymmetric solutions of some supergravity theory. After an general introduction to how the pursuit of unification has lead to the vacuum selection problem, we are going to review some recent results on the problem of finding all the supersymmetric solutions of a supergravity theory applied to the N=4,d=4 supergravity case.
description: Enlarged version of the talks given at the Pomeranian Workshop on Cosmology and Fundamental Physics (Pobierowo, Poland) and the 2005 Spanish Relativity Meeting (in Oviedo, Spain). Latex 2e file, 21 pages, no figures
A Nonlinear Charge- and Flux-Tunable Cavity Derived from an Embedded Cooper Pair Transistor
Creators: name: Brock, B. L.
name: Li, Juliang
name: Kanhirathingal, S.
name: Thyagarajan, B.
name: Braasch, William F.
name: Blencowe, M. P.
name: Rimberg, A. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce the cavity-embedded Cooper pair transistor (cCPT), a device which behaves as a highly nonlinear microwave cavity whose resonant frequency can be tuned both by charging a gate capacitor and by threading flux through a SQUID loop. We characterize this device and find excellent agreement between theory and experiment. A key difficulty in this characterization is the presence of frequency fluctuations comparable in scale to the cavity linewidth, which deform our measured resonance circles in accordance with recent theoretical predictions [Brock et al., Phys. Rev. Applied 14, 054026 (2020)]. By measuring the power spectral density of these frequency fluctuations at carefully chosen points in parameter space, we find that they are primarily a result of the $1/f$ charge and flux noise common in solid state devices. Notably, we also observe key signatures of frequency fluctuations induced by quantum fluctuations in the cavity field via the Kerr nonlinearity.
Rugged mHz-Linewidth Superradiant Laser Driven by a Hot Atomic Beam
Creators: name: Liu, Haonan
name: Jäger, Simon B.
name: Yu, Xianquan
name: Touzard, Steven
name: Shankar, Athreya
name: Holland, Murray J.
name: Nicholson, Travis L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We propose a new type of superradiant laser based on a hot atomic beam traversing an optical cavity. We show that the theoretical minimum linewidth and maximum power are competitive with the best ultracoherent clock lasers. Also, our system operates naturally in continuous wave mode, which has been elusive for superradiant lasers so far. Unlike existing ultracoherent lasers, our design is simple and rugged. This makes it a candidate for the first widely accessible ultracoherent laser, as well as the first to realize sought-after applications of ultracoherent lasers in challenging environments.
description: Main text has 6 pages, 4 figures; Supplemental Material has 12 pages, 1 figure, and 2 tables
Fermions from Half-BPS Supergravity
Creators: name: Mandal, Gautam
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss collective coordinate quantization of the half-BPS geometries of Lin, Lunin and Maldacena (hep-th/0409174). The LLM geometries are parameterized by a single function $u$ on a plane. We treat this function as a collective coordinate. We arrive at the collective coordinate action as well as path integral measure by considering D3 branes in an arbitrary LLM geometry. The resulting functional integral is shown, using known methods (hep-th/9309028), to be the classical limit of a functional integral for free fermions in a harmonic oscillator. The function $u$ gets identified with the classical limit of the Wigner phase space distribution of the fermion theory which satisfies u * u = u. The calculation shows how configuration space of supergravity becomes a phase space (hence noncommutative) in the half-BPS sector. Our method sheds new light on counting supersymmetric configurations in supergravity.
description: 28 pages, 2 figures, epsf;(v3) eq. (3.3) clarified and notationally simplified; version to appear in JHEP
On stretch-limited elastic strings
Creators: name: Rodriguez, Casey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Motivated by the increased interest in modeling nondissipative materials by constitutive relations more general than those from Cauchy elasticity, we initiate the study of a class of stretch-limited elastic strings: the string cannot be compressed smaller than a certain length less than its natural length nor elongated larger than a certain length greater than its natural length. In particular, we consider equilibrium states for a string suspended between two points under the force of gravity (catenaries). We study the locations of the supports resulting in tensile states containing both extensible and inextensible segments in two situations: the degenerate case when the string is vertical and the nondegenerate case when the supports are at the same height. We then study the existence and multiplicity of equilibrium states in general with multiplicity differing markedly from strings satisfying classical constitutive relations.
description: 18 pages. Added references, minor comments and corrected typos
Breaking Symmetries of the Reservoir Equations in Echo State Networks
Creators: name: Herteux, Joschka
name: Räth, Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Reservoir computing has repeatedly been shown to be extremely successful in the prediction of nonlinear time-series. However, there is no complete understanding of the proper design of a reservoir yet. We find that the simplest popular setup has a harmful symmetry, which leads to the prediction of what we call mirror-attractor. We prove this analytically. Similar problems can arise in a general context, and we use them to explain the success or failure of some designs. The symmetry is a direct consequence of the hyperbolic tangent activation function. Further, four ways to break the symmetry are compared numerically: A bias in the output, a shift in the input, a quadratic term in the readout, and a mixture of even and odd activation functions. Firstly, we test their susceptibility to the mirror-attractor. Secondly, we evaluate their performance on the task of predicting Lorenz data with the mean shifted to zero. The short-time prediction is measured with the forecast horizon while the largest Lyapunov exponent and the correlation dimension are used to represent the climate. Finally, the same analysis is repeated on a combined dataset of the Lorenz attractor and the Halvorsen attractor, which we designed to reveal potential problems with symmetry. We find that all methods except the output bias are able to fully break the symmetry with input shift and quadratic readout performing the best overall.
description: 14 pages, 10 figures, accepted by chaos
DEVELOPMENT OF SPEAKING COMPETENCE OF STUDENTS THROUGH STUDYING PAHLAVAN MAHMUD'S RUBAI
Creators: name: Sulaymonova, Nafisa
Publisher: name: Zenodo
Year: 2024

description: This scientific article reflects on the methods of forming the elements of speech competence through an innovative approach in teaching the students of the academic lyceum the grace of Pahlavon Mahmud rubai, the skill of choosing words, the use of artistic image tools, and the methods of creating skills. It is shown that the tools of artistic imagery in lyrics, the masterpieces of poetic art, reveal their inner, hidden abilities of students and encourage them to think creatively and come up with promising ideas.
Asymptotic expansion for inverse moments of binomial and Poisson distributions
Creators: name: Znidaric, Marko
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: An asymptotic expansion for inverse moments of positive binomial and Poisson distributions is derived. The expansion coefficients of the asymptotic series are given by the positive central moments of the distribution. Compared to previous results, a single expansion formula covers all (also non-integer) inverse moments. In addition, the approach can be generalized to other positive distributions.
description: 8 pages
Global minimum determination of the Born-Oppenheimer surface within density functional theory
Creators: name: Goedecker, Stefan
name: Hellmann, Waldemar
name: Lenosky, Thomas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present a novel method, which we call dual minima hopping method (DMHM), that allows us to find the global minimum of the potential energy surface (PES) within density functional theory for systems where a fast but less accurate calculation of the PES is possible. This method can rapidly find the ground state configuration of clusters and other complex systems with present day computer power by performing a systematic search. We apply the new method to silicon clusters. Even though these systems have already been extensively studied by other methods, we find new configurations that are lower in energy than the previously found.
description: 4 pages, 3 figures, minor changes, more structures are presented now
On the Quantum Theory of Massless Spin-3/2 Field in Minkowski Spacetime
Creators: name: Qiu, Weigang
name: Sun, Fei
name: Zhang, Hongbao
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: From the modern viewpoint and by the geometric method, this paper provides a concise foundation for the quantum theory of massless spin-3/2 field in Minkowski spacetime, which includes both the one-particle's quantum mechanics and the many-particle's quantum field theory. The explicit result presented here is useful for the investigation of spin-3/2 field in various circumstances such as supergravity, twistor programme, Casimir effect, and quantum inequality.
description: 11 pages, typos corrected, accepted for publication in Int.J.Geom. Methods Mod. Phys
Covariant canonical gauge theory of gravitation for fermions
Creators: name: Struckmeier, Jürgen
name: Vasak, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive the interaction of fermions with a dynamical space-time based on the postulate that the description of physics should be independent of the reference frame, which means to require the form-invariance of the fermion action under diffeomorphisms. The derivation is worked out in the Hamiltonian formalism as a canonical transformation along the line of non-Abelian gauge theories. This yields a closed set of field equations for fermions, unambiguously fixing their coupling to dynamical space-time. We encounter, in addition to the well-known minimal coupling, anomalous couplings to curvature and torsion. In torsion-free geometries that anomalous interaction reduces to a Pauli-type coupling with the curvature scalar via a spontaneously emerged new coupling constant with the dimension of mass resp.\ inverse length. A consistent model Hamiltonian for the free gravitational field and the impact of its functional form on the structure of the dynamical geometry space-time is discussed.
description: 21 pages
DEVELOPMENT OF SPEAKING COMPETENCE OF STUDENTS THROUGH AN INNOVATIVE APPROACH IN TEACHING THE STORY OF NAVOIY "ZAYD ZAHHOB"
Creators: name: Sulaymonova, Nafisa
Publisher: name: Zenodo
Year: 2024

description: This scientific article reflects on the methods of forming the elements of speech competence through an innovative approach in teaching academic lyceum students the grace of Alisher Navoi's literary heritage, the skill of choosing words, and the use of artistic image tools. It is shown that the charm of the masterpieces of art and speech art in Navoi's epic reveals the inner, hidden abilities of the students, and encourages them to think creatively and come up with creative ideas.
Excavating "Excavating AI": The Elephant in the Gallery
Creators: name: Lyons, Michael J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: K.4.0
subject: 68T01

description: Two art exhibitions, "Training Humans" and "Making Faces," and the accompanying essay "Excavating AI: The politics of images in machine learning training sets" by Kate Crawford and Trevor Paglen, are making substantial impact on discourse taking place in the social and mass media networks, and some scholarly circles. Critical scrutiny reveals, however, a self-contradictory stance regarding informed consent for the use of facial images, as well as serious flaws in their critique of ML training sets. Our analysis underlines the non-negotiability of informed consent when using human data in artistic and other contexts, and clarifies issues relating to the description of ML training sets.
description: 15 pages, 4 figures
MPEC 2024-A85 : 2024 AV1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 AV1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
NAVOIY« SA'D HIKOYASI»NI OʻRGATISHDA   INNOVATSION YONDASHUV ORQALI OʻQUVCHILAR NUTQIY KOMPETENSIYASINI RIVOJLANTIRSH
Creators: name: Sulaymonova, Nafisa
Publisher: name: Zenodo
Year: 2024

description: Bu ilmiy maqola akademik litsey oʻquvchilariga Alisher Navoiyning «Sa’d hikoyasi» matnini  oʻrgatishda innovatsion yondashuv orqali nutqiy kompetensiyalarni rivojlantirish usullari, matn mazmunini, badiiy tasvir vositalarini aniqlash koʻnikmasini hosil qilish usllari haqida fikr yuritadi. Navoiy dostonidagi badiilik, soʻz san’ati  durdonalaridagi joziba   oʻquvchilarning oʻz ichki, yashirin qobiliyatlarini ochib berishi bilan birga kreativ fikrlashga, bunyodkor  gʻoyalarning yuzaga kelshiga  undashi koʻrsatib beriladi.
Rough translation of file 027_B (collection LA 256)
Creators: name: Parker, Verdena
name: Lee-Wynant, Tyler
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-280318-08: Rough translation (minute-by-minute) of 027_B (tape 27, side B) from LA 256 (collection of recordings given to the Berkeley Language Center by Verdena), from 34:59 to end - no transcription in this session, translation only. Due to re-numbering, tape 027_B has been assigned to the CLA item number LA256.027, audio file LA256.027B.
Persistent Collective Motion of a Dispersing Membrane Domain
Creators: name: Sorkin, Benjamin
name: Diamant, Haim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the Brownian motion of an assembly of mobile inclusions embedded in a fluid membrane. The motion includes the dispersal of the assembly, accompanied by the diffusion of its center of mass. Usually, the former process is much faster than the latter, since the diffusion coefficient of the center of mass is inversely proportional to the number of particles. However, in the case of membrane inclusions, we find that the two processes occur on the same time scale, thus prolonging significantly the lifetime of the assembly as a collectively moving object. This effect is caused by the quasi-two-dimensional membrane flows, which couple the motions even of the most remote inclusions in the assembly. The same correlations also cause the diffusion coefficient of the center of mass to decay slowly with time, resulting in weak sub-diffusion. We confirm our analytical results by Brownian dynamics simulations with flow-mediated correlations. The effect reported here should have implications for the stability of nano-scale membrane heterogeneities.
description: 13 pages
The directional contact distance of two ellipsoids: Coarse-grained potentials for anisotropic interactions
Creators: name: Paramonov, Leonid
name: Yaliraki, S. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We obtain the distance of closest approach of the surfaces of two arbitrary ellipsoids valid at any orientation and separation, measured along their inter-center vector. This directional distance is derived from the Elliptic Contact Function. The geometric meaning behind this approach is clarified. An elliptic pair potential for modelling arbitrary mixtures of elliptic particles, whether hard or soft, is proposed based on this distance. Comparisons to Gay-Berne potentials are discussed. Analytic expressions for the forces and torques acting on the elliptic particles are given.
title: The Three Muscateers
title: An exploration of how the convergence of three elements: critical pedagogy, living theory and participatory action research spark students’ epistemological curiosity to support their primary-secondary mathematics transitions in Muscat, Oman.
titleType: Subtitle
Creators: name: Matiti, Jo
Publisher: name: Lancaster University
Year: 2022

description: The convergence of three elements rooted in critical theory: critical pedagogy, living theory and participatory action research (PAR) is explored in the context of a British curriculum school in Muscat, Oman. This exploration centres on the social justice impact on students’ primary-secondary mathematics transitions. This transition is established as being challenging for many students and negatively impacts on their future lives. The literature review sets out a theoretical framework of critical pedagogy through which existing transition research and practise are examined. This evidences the significant social injustice in the pedagogy at the heart of existing transitions. The lens of critical pedagogy grounded in ontological values of critical hope, love and respect, highlights that an alternative approach is needed which empowers students to develop their epistemological curiosity in their mathematics transitions. The methodology of living theory is explored in depth to establish a theoretical foundation for this participatory action research study. Year 6 students (aged 10-11 years) actively engaged in research to interrogate their upcoming mathematics transitions from primary to secondary school and were empowered to seek the support they needed. Two iterations of PAR were conducted over two years with a total of 192 students. The thesis pauses for a brief reverie to discuss, with critical hope, the possibilities this participatory action research has to create wider social change. The theories of critical pedagogy and living theory are then combined to analyse the findings. The discussion focuses on the impact this convergence of critical pedagogy, living theory methodology and PAR has on the student participants. The social justice potential of intertwining these three elements in Muscat inspires the term The Three Muscateers in honour of the social justice potential observed in this study. The thesis contributes to the field of transition literature, answering a call for further transition research which explores methodologies to elevate students’ voices. The PAR has resulted in pedagogical change to transition policy and is an example for teachers and researchers seeking to explore how students can create more epistemologically empowered and successful primary-secondary mathematics transitions through PAR framed by critical pedagogy and living theory.
When is star formation episodic? A delay differential equation negative feedback model
Creators: name: Quillen, Alice C.
name: Bland-Hawthorn, Joss
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We introduce a differential equation for star formation in galaxies that incorporates negative feedback with a delay. When the feedback is instantaneous, solutions approach a self-limiting equilibrium state. When there is a delay, even though the feedback is negative, the solutions can exhibit cyclic and episodic solutions. We find that periodic or episodic star formation only occurs when two conditions are satisfied. Firstly the delay timescale must exceed a cloud consumption timescale. Secondly the feedback must be strong. This statement is quantitatively equivalent to requiring that the timescale to approach equilibrium be greater than approximately twice the cloud consumption timescale. The period of oscillations predicted is approximately 4 times the delay timescale. The amplitude of the oscillations increases with both feedback strength and delay time. We discuss applications of the delay differential equation (DDE) model to star formation in galaxies using the cloud density as a variable. The DDE model is most applicable to systems that recycle gas and only slowly remove gas from the system. We propose likely delay mechanisms based on the requirement that the delay time is related to the observationally estimated time between episodic events. The proposed delay timescale accounting for episodic star formation in galaxy centers on periods similar to P 10 Myrs, irregular galaxies with P 100 Myrs, and the Milky Way disk with P~ 2Gyr, could be that for exciting turbulence following creation of massive stars, that for gas pushed into the halo to return and interact with the disk and that for spiral density wave evolution, respectively.
description: submitted to MNRAS
Non-Abelian Alice strings in two-flavor dense QCD
Creators: name: Fujimoto, Yuki
name: Nitta, Muneto
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Quark-hadron continuity with two-flavor quarks that was proposed recently connects hadronic matter with neutron $^3P_2$ superfluidity and two-flavor dense quark matter. This two-flavor dense quark phase consists of the coexistence of the 2SC condensates and the $P$-wave diquark condensates of $d$-quarks, which gives rise to color superconductivity as well as superfluidity. We classify vortices in this phase. The most stable vortices are what we call the non-Abelian Alice strings, which are superfluid vortices with non-Abelian color magnetic fluxes therein, exhibiting so-called topological obstruction, or a non-Abelian generalization of the Alice property. We show that a single Abelian superfluid vortex is unstable against decay into three non-Abelian Alice strings. We discover that a non-Abelian Alice string carries orientational moduli of the real projective space $\mathbb{R}P^2$ corresponding to the color flux therein in the presence of the $P$-wave condensates alone. We calculate Aharanov-Bohm (AB) phases around the non-Abelian Alice string, and find that the 2SC condensates and string's orientational moduli must be aligned with each other because of single-valuedness of the AB phases of the 2SC condensates.
description: 14 pages, 4 figures; v2: published version
Covariant propagator and chiral power counting
Creators: name: Liu, Zhou
name: Wen, Li-Hong
name: Yang, J. -F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Some one-loop diagrams with one and two external baryons/nucleons are revisited using covariant baryon propagators in chiral effective theory. We showed that it is enough to separate and subtract all the local terms that violate chiral power counting to recover chiral power counting, no need to introduce extra operations. The structures of leading chiral corrections and IR enhancement or threshold effects are 'stable' or persist as long as covariant propagators are employed for all particles.
description: 9 pages, 11 figures, final version, accepted for publication in Nuclear Physics B
REVISÃO INTEGRATIVA SOBRE AUTORREGULAÇÃO DA APRENDIZAGEM PARA ALUNOS DE 6º ANO DO ENSINO FUNDAMENTAL
Creators: name: Alfieri, Fábio Marcon
Publisher: name: Internet Latent Corpus Journal
Year: 2023

description: Estudos demonstram que a transição do quinto para o sexto ano é um período em que ocorre aumento de estresse e diminuição do autoconceito especialmente nas dimensões acadêmicas. Diante deste cenário, surge a questão: como auxiliar os alunos durante essa fase de transição? Seria a autorregulação da aprendizagem uma abordagem viável para atender às necessidades dessa faixa etária? O objetivo deste estudo é realizar uma revisão integrativa da literatura a fim de analisar as estratégias de autorregulação empregadas por alunos do 6° ano em diferentes países e sua relação com o desenvolvimento acadêmico. Para atingir tal propósito, foram realizadas pesquisas em periódicos nas bases científicas CAPES PERIÓDICOS, ERIC, RCAAP e SCIELO, abrangendo um intervalo dos últimos cinco anos, com a utilização dos descritores self-regulation, learning e 6th grade. Após critérios de filtragem, foram selecionados 9 artigos que serviram como base para a análise integrativa. Independentemente do espaço geográfico ou do instrumento utilizado, os resultados demonstram que os alunos autorregulados têm apresentado níveis mais elevados de motivação, organização e melhor desempenho acadêmico, além de maior autoeficácia e consequentemente redução de comportamentos prejudiciais ao aprendizado.
description: Internet Latent Corpus Journal, vol. 14 n.º 1 (2024): .
Transcription of the narration of Reel #6 (collection LA 256)
Creators: name: Parker, Verdena
name: Lee-Wynant, Tyler
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-280318-07: transcription of VP-190317-10 (narration of Reel #6 from the LA 256 collection at SCOIL, one of six reels of 8mm film created by Verdena in the 1960s, featuring scenes of everyday life around Hoopa Valley as well as Brush Dances), from 15:11 to 20:10. Due to re-numbering, Reel #6 has been assigned the CLA item number LA 256.045.
Design and Analysis of Nonbinary LDPC Codes for Arbitrary Discrete-Memoryless Channels
Creators: name: Bennatan, Amir
name: Burshtein, David
Publisher: name: arXiv
Year: 2005
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We present an analysis, under iterative decoding, of coset LDPC codes over GF(q), designed for use over arbitrary discrete-memoryless channels (particularly nonbinary and asymmetric channels). We use a random-coset analysis to produce an effect that is similar to output-symmetry with binary channels. We show that the random selection of the nonzero elements of the GF(q) parity-check matrix induces a permutation-invariance property on the densities of the decoder messages, which simplifies their analysis and approximation. We generalize several properties, including symmetry and stability from the analysis of binary LDPC codes. We show that under a Gaussian approximation, the entire q-1 dimensional distribution of the vector messages is described by a single scalar parameter (like the distributions of binary LDPC messages). We apply this property to develop EXIT charts for our codes. We use appropriately designed signal constellations to obtain substantial shaping gains. Simulation results indicate that our codes outperform multilevel codes at short block lengths. We also present simulation results for the AWGN channel, including results within 0.56 dB of the unconstrained Shannon limit (i.e. not restricted to any signal constellation) at a spectral efficiency of 6 bits/s/Hz.
description: To appear, IEEE Transactions on Information Theory, (submitted October 2004, revised and accepted for publication, November 2005). The material in this paper was presented in part at the 41st Allerton Conference on Communications, Control and Computing, October 2003 and at the 2005 IEEE International Symposium on Information Theory
NAVIGATING AGING: A COMPARATIVE ANALYSIS OF FUNCTIONAL HEALTH AMONG ELDERLY INDIVIDUALS IN TAMIL NADU
Creators: name: C NANDHAA
name: G. E. BARKAVI
Publisher: name: Zenodo
Year: 2023
Subjects: Elderly Individuals, Functional Health, Old Age Homes, Living With Relatives, Sensory Health

description: Abstract

This study performs a thorough comparative investigation of the functional health of older adults who live in old age homes against those who reside with their families in Tamil Nadu. The main objective is to analyse variables associated with sensory health, mobility, and daily activities in order to identify subtle variations that impact the overall well-being of elderly individuals residing in different living situations. The result indicates that persons who reside with family members experience somewhat improved sensory health, suggesting possible benefits of familial assistance. Although all groups demonstrate a significant degree of autonomy in their ability to move and take care of themselves, certain differences indicate the necessity for customised treatments depending on their living situations. The daily routines exhibit slight variations, highlighting the adaptability of older adults in different environments. The significance of care underscores the necessity of acknowledging and resolving distinct requirements linked to various living conditions. This study provides significant information to guide policies and healthcare practices that prioritise the different requirements of the ageing population.
Multi-Gauge-Boson Vertices and Chiral Lagrangian Parameters in Higgsless Models with Ideal Fermion Delocalization
Creators: name: Chivukula, R. Sekhar
name: He, Hong-Jian
name: Kurachi, Masafumi
name: Simmons, Elizabeth H.
name: Tanabashi, Masaharu
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Higgsless models with fermions whose SU(2) properties are "ideally delocalized," such that the fermion's probability distribution is appropriately related to the W boson wavefunction, have been shown to minimize deviations in precision electroweak parameters. As contributions to the S parameter vanish to leading order, current constraints on these models arise from limits on deviations in multi-gauge-boson vertices. We compute the form of the triple and quartic gauge boson vertices in these models and show that these constraints provide lower bounds only of order a few hundred GeV on the masses of the lightest KK resonances. Higgsless models with ideal fermion delocalization provide an example of extended electroweak gauge interactions with suppressed couplings of fermions to extra gauge-bosons, and these are the only models for which triple-gauge-vertex measurements provide meaningful constraints. We relate the multi-gauge couplings to parameters of the electroweak chiral Lagrangian, and the parameters obtained in these SU(2) x SU(2) models apply equally to the corresponding five dimensional gauge theory models of QCD. We also discuss the collider phenomenology of the KK resonances in models with ideal delocalization. These resonances are found to be fermiophobic, therefore traditional direct collider searches are not sensitive to them and measurements of gauge-boson scattering will be needed to find them.
description: 28 pages, 1 eps figure. Typo in reference corrected
The resonances $X(4140)$, $X(4160)$, and $P_{cs}(4459)$ in the decay of $Λ_b\to J/ψΛϕ$
Creators: name: Liu, Wen-Ying
name: Hao, Wei
name: Wang, Guan-Ying
name: Wang, Yan-Yan
name: Wang, En
name: Li, De-Min
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the decay of $Λ_b\to J/ψΛϕ$ by taking into account the intermediate resonances $X(4140)$, $X(4160)$, and $P_{cs}(4459)$. In addition to the peak of the $X(4140)$, we also find a bump structure around 4160 MeV followed by a cusp structure around $D^*_s\bar{D}^*_s$ threshold in the $J/ψϕ$ invariant mass distribution of the $Λ_b\to J/ψΛϕ$ process, which can be associated to the $D^*_s\bar{D}^*_s$ molecular state $X(4160)$. We also show that this reaction can also be used to confirm the existence of the hidden-charm pentaquark $P_{cs}(4459)$ with strangeness. We predict an enhancement structure close to the threshold in the $D^*_s\bar{D}^*_s$ invariant mass distribution of the $Λ_b\to D^*_s\bar{D}^*_sΛ$ process, which is the reflection of the $X(4160)$ and should not be misidentified with a new resonance. We strongly suggest experimentalists to further measure these processes, which can be useful to clarify the nature of $X(4140)$ and $X(4160)$ resonances, and to confirm the existence of the $P_{cs}(4459)$.
description: 8 pages, 10 figures
Feynman diagams coupled to three-dimensional quantum gravity
Creators: name: Barrett, John W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A framework for quantum field theory coupled to three-dimensional quantum gravity is proposed. The coupling with quantum gravity regulates the Feynman diagrams. One recovers the usual Feynman amplitudes in the limit as the cosmological constant tends to zero.
description: 7 pages. v2: minor corrections, added ref
A sparse regression approach to modeling the relation between galaxy stellar masses and their host halos
Creators: name: Icaza-Lizaola, M.
name: Bower, Richard G.
name: Norberg, Peder
name: Cole, Shaun
name: Schaller, Matthieu
name: Egan, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Sparse regression algorithms have been proposed as the appropriate framework to model the governing equations of a system from data, without needing prior knowledge of the underlying physics. In this work, we use sparse regression to build an accurate and explainable model of the stellar mass of central galaxies given properties of their host dark matter (DM) halo. Our data set comprises 9,521 central galaxies from the EAGLE hydrodynamic simulation. By matching the host halos to a DM-only simulation, we collect the halo mass and specific angular momentum at present time and for their main progenitors in 10 redshift bins from $z=0$ to $z=4$. The principal component of our governing equation is a third-order polynomial of the host halo mass, which models the stellar-mass halo-mass relation. The scatter about this relation is driven by the halo mass evolution and is captured by second and third-order correlations of the halo mass evolution with the present halo mass. An advantage of sparse regression approaches is that unnecessary terms are removed. Although we include information on halo specific angular momentum, these parameters are discarded by our methodology. This suggests that halo angular momentum has little connection to galaxy formation efficiency. Our model has a root mean square error (RMSE) of $0.167 \log_{10}(M^*/M_\odot)$, and accurately reproduces both the stellar mass function and central galaxy correlation function of EAGLE. The methodology appears to be an encouraging approach for populating the halos of DM-only simulations with galaxies, and we discuss the next steps that are required.
description: 20 pages, 15 figures
Small-scale structure formation properties of chilled sterile neutrinos as dark matter
Creators: name: Petraki, Kalliopi
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the free-streaming length and the phase space density of dark-matter sterile neutrinos produced from decays, at the electroweak scale, of a gauge singlet in the Higgs sector. These quantities, which depend on the dark-matter production mechanism, are relevant to the study of small-scale structure formation and may be used to constrain or rule out dark-matter candidates.
description: 6 pages, 3 figures
Radioactive 26Al and massive stars in the Galaxy
Creators: name: Diehl, Roland
name: Halloin, Hubert
name: Kretschmer, Karsten
name: Lichti, Giselher G.
name: Schoenfelder, Volker
name: Strong, Andrew W.
name: von Kienlin, Andreas
name: Wang, Wei
name: Jean, Pierre
name: Knoedlseder, Juergen
name: Roques, Jean-Pierre
name: Weidenspointner, Georg
name: Schanne, Stephane
name: Hartmann, Dieter H.
name: Winkler, Christoph
name: Wunderer, Cornelia
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma-rays from radioactive 26Al (half life ~7.2 10^5 yr) provide a 'snapshot' view of ongoing nucleosynthesis in the Galaxy. The Galaxy is relatively transparent to such gamma-rays, and emission has been found concentrated along the plane of the Galaxy. This led to the conclusion1 that massive stars throughout the Galaxy dominate the production of 26Al. On the other hand, meteoritic data show locally-produced 26Al, perhaps from spallation reactions in the protosolar disk. Furthermore, prominent gamma-ray emission from the Cygnus region suggests that a substantial fraction of Galactic 26Al could originate in localized star-forming regions. Here we report high spectral resolution measurements of 26Al emission at 1808.65 keV, which demonstrate that the 26Al source regions corotate with the Galaxy, supporting its Galaxy-wide origin. We determine a present-day equilibrium mass of 2.8 (+/-0.8) M_sol of 26Al. We use this to estimate that the frequency of core collapse (i.e. type Ib/c and type II) supernovae to be 1.9(+/- 1.1) events per century.
description: accepted for publication in Nature, 24 pages including Online Supplements, 11 figures, 1 table
Dynamic mechanical response of carbon nanotube yarns and their in situ electrical measurements
Creators: name: Pérez-Aranda, C.
name: Carrillo-Escalante, H.
name: Pech-Pisté, R.
name: Hernández-Sánchez, F.
name: Avilés, F.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Plant Biology
subject: Computational Biology

description: Carbon nanotube yarns (CNTYs) are outstanding hierarchical fibers with electrical properties that depend on temperature and mechanical stimuli, which makes them attractive as smart materials for sensing applications. In order to better understand the electrical response of CNTYs under a combination of dynamic loading and variations of temperature, their monotonic and cyclic tensile mechanical response, in situ Raman spectroscopy, mechanical hysteresis, and dynamic mechanical analysis (DMA) are investigated herein. The piezoresistivity and thermoresistivity of CNTYs were characterized to correlate the contribution of temperature and strain to the effective electrical response of the CNTY under DMA testing. It was found that the tensile load bearing of the CNTYs is governed mainly by structural changes of its bundles/fibrils, rather than by stretching of the carbon bonds. The large energy dissipation capabilities of the CNTYs arise mainly from friction among their fibrils and bundles, and also due to irreversible morphological changes in their hierarchical structure. The (mechanically constrained) thermoresistive characterization showed that the electrical resistance of the CNTYs decreases with increasing temperature, yielding an average temperature coefficient of resistance of −8.63 × 10−4 K−1. The electrical response of the CNTYs during DMA temperature scans is governed by their thermoresistive response.
Moiré-trapped interlayer trions in a charge-tunable WSe$_2$/MoSe$_2$ heterobilayer
Creators: name: Brotons-Gisbert, Mauro
name: Baek, Hyeonjun
name: Campbell, Aidan
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Gerardot, Brian D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Transition metal dichalcogenide heterobilayers offer attractive opportunities to realize lattices of interacting bosons with several degrees of freedom. Such heterobilayers can feature moiré patterns that modulate their electronic band structure, leading to spatial confinement of single interlayer excitons (IXs) that act as quantum emitters with $C_3$ symmetry. However, the narrow emission linewidths of the quantum emitters contrast with a broad ensemble IX emission observed in nominally identical heterobilayers, opening a debate regarding the origin of IX emission. Here we report the continuous evolution from a few trapped IXs to an ensemble of IXs with both triplet and singlet spin configurations in a gate-tunable $2H$-MoSe$_2$/WSe$_2$ heterobilayer. We observe signatures of dipolar interactions in the IX ensemble regime which, when combined with magneto-optical spectroscopy, reveal that the narrow quantum-dot-like and broad ensemble emission originate from IXs trapped in moiré potentials with the same atomic registry. Finally, electron doping leads to the formation of three different species of localised negative trions with contrasting spin-valley configurations, among which we observe both intervalley and intravalley IX trions with spin-triplet optical transitions. Our results identify the origin of IX emission in MoSe$_2$/WSe$_2$ heterobilayers and highlight the important role of exciton-exciton interactions and Fermi-level control in these highly tunable quantum materials.
description: 12 pages, 4 figures
Horizon energy and angular momentum from a Hamiltonian perspective
Creators: name: Booth, Ivan
name: Fairhurst, Stephen
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Classical black holes and event horizons are highly non-local objects, defined in terms of the causal past of future null infinity. Alternative, (quasi)local definitions are often used in mathematical, quantum, and numerical relativity. These include apparent, trapping, isolated, and dynamical horizons, all of which are closely associated to two-surfaces of zero outward null expansion. In this paper we show that three-surfaces which can be foliated with such two-surfaces are suitable boundaries in both a quasilocal action and a phase space formulation of general relativity. The resulting formalism provides expressions for the quasilocal energy and angular momentum associated with the horizon. The values of the energy and angular momentum are in agreement with those derived from the isolated and dynamical horizon frameworks.
description: 39 pages, 3 figures, Final Version : content essentially unchanged but many small improvements made in response to referees, a few references added