cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
La transformation digitale améliore-t-elle l'inclusion financière ? Evidence par les Technologies de pointes en Afrique
Creators: name: EWODO Yves Loïc
Publisher: name: Zenodo
Year: 2024

description: Cet article met en évidence les effets de la transformation digitale sur l’inclusion financière à partir d’un échantillon de 33 pays Africain sur la période 2008 à 2021. Nous mesurons transformation digitale en utilisant l’indice du niveau de préparation aux technologies de pointes (IPTP) fourni par la base de données de la CNUCED et l’inclusion est mesurée par un indice composite intégrant sous indices: la pénétration, la disponibilité et l’utilisation. De plus, cinq variables de contrôle sont utilisées dans l’étude. Sur la base de la technique des moindres carrés en deux étapes à variables instrumentales (IV-2SLS), nous obtenons les résultats suivants: premièrement, la transformation digitale améliore l’inclusion financière en Afrique. Deuxièmement, nos résultats restent stables en utilisant les variantes de l’estimateur 2SLS (gmm2s, Liml, Cue). Et enfin, nos résultats restent robustes en désagrégeant l’indice d’inclusion financière. La recommandation générale aux décideurs publiques des pays africains est qu’ils doivent assurer le développement des infrastructures technologiques et encourager le secteur financier à adopter les technologies de pointes innovantes (l’intelligence Artificielle (IA), le Big-Data, la Biométrie etc.) afin de favoriser l’accès et d’améliorer l’usage des services financiers tout en mettant sur pieds des mécanismes pour contrôler les risques inhérents à l’adoption des technologies numériques.
Infrared Absorption and its Sources of CdZnTe at Cryogenic Temperature
Creators: name: Maeshima, Hiroshi
name: Matsumoto, Kosei
name: Hirahara, Yasuhiro
name: Nakagawa, Takao
name: Koga, Ryoichi
name: Hanamura, Yusuke
name: Wada, Takehiko
name: Nagase, Koichi
name: Oyabu, Shinki
name: Suzuki, Toyoaki
name: Kokusho, Takuma
name: Kaneda, Hidehiro
name: Ishikawa, Daichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: To reveal the infrared absorption causes in the wavelength region between electronic and lattice absorptions, we measured the temperature dependence of the absorption coefficient of $p$-type low-resistivity ($\sim 10^2~{\rm Ωcm}$) CdZnTe crystals. We measured the absorption coefficients of CdZnTe crystals in four-wavelength bands ($λ=6.45$, 10.6, 11.6, 15.1$~μ$m) over the temperature range of $T=8.6-300$ K with an originally developed system. The CdZnTe absorption coefficient was measured to be $α=0.3-0.5$ ${\rm cm^{-1}}$ at $T=300$ K and $α=0.4-0.9$ ${\rm cm^{-1}}$ at $T=8.6$ K in the investigated wavelength range. With an absorption model based on transitions of free holes and holes trapped at an acceptor level, we conclude that the absorption due to free holes at $T=150-300$ K and that due to trapped-holes at $T<50$ K are dominant absorption causes in CdZnTe. We also discuss a method to predict the CdZnTe absorption coefficient at cryogenic temperature based on the room-temperature resistivity.
description: Accepted for publication in Journal of Electronic Material, 30 pages, 6 figures, 5 tables
The X(3872) and other possible $XYZ$ molecular states
Creators: name: Ortega, P. G.
name: Segovia, J.
name: Entem, D. R.
name: Fernández, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform a coupled channel calculation of the $DD^*$ and $c\bar c$ sectors in the framework of a constituent quark model. The interaction for the $DD^*$ states is obtained using the Resonant Group Method (RGM) and the underlying quark interaction model. The coupling with the two quark system is performed using the $^3 P_0$ model. The X(3872) is found as a molecular state with a sizable $c\bar c$ component. A comparison with Belle and BaBar data has been done, finding a good agreement. Other possible molecular molecular states are discussed.
description: 5 pages, 5 figures, Proceedings to the Hadron 2009 - XIII International Conference on Hadron Spectroscopy, Florida State University (USA)
Supersymmetric partners of the trigonometric Poschl-Teller potentials
Creators: name: Contreras-Astorga, Alonso
name: C, David J Fernandez
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The first and second-order supersymmetry transformations are used to generate Hamiltonians with known spectra departing from the trigonometric Poschl-Teller potentials. The several possibilities of manipulating the initial spectrum are fully explored, and it is shown how to modify one or two levels, or even to leave the spectrum unaffected. The behavior of the new potentials at the boundaries of the domain is studied.
description: 20 pages, 4 figures
Evolving Twitter: an experimental analysis of graph properties of the social graph
Creators: name: Antonakaki, Despoina
name: Ioannidis, Sotiris
name: Fragopoulou, Paraskevi
Publisher: name: arXiv
Year: 2015
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Twitter is one of the most prominent Online Social Networks. It covers a significant part of the online worldwide population~20% and has impressive growth rates. The social graph of Twitter has been the subject of numerous studies since it can reveal the intrinsic properties of large and complex online communities. Despite the plethora of these studies, there is a limited cover on the properties of the social graph while they evolve over time. Moreover, due to the extreme size of this social network (millions of nodes, billions of edges), there is a small subset of possible graph properties that can be efficiently measured in a reasonable timescale. In this paper we propose a sampling framework that allows the estimation of graph properties on large social networks. We apply this framework to a subset of Twitter's social network that has 13.2 million users, 8.3 billion edges and covers the complete Twitter timeline (from April 2006 to January 2015). We derive estimation on the time evolution of 24 graph properties many of which have never been measured on large social networks. We further discuss how these estimations shed more light on the inner structure and growth dynamics of Twitter's social network.
Effect of Mg-Al insertion on magnetotransport properties in epitaxial Fe/sputter-deposited $MgAl_{2}O_{4}$/Fe(001) magnetic tunnel junctions
Creators: name: Belmoubarik, Mohamed
name: Sukegawa, Hiroaki
name: Ohkubo, Tadakatsu
name: Mitani, Seiji
name: Hono, Kazuhiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the effect of a Mg-Al layer insertion at the bottom interface of epitaxial Fe/$MgAl_{2}O_{4}$/Fe(001) magnetic tunnel junctions (MTJs) on their spin-dependent transport properties. The tunnel magnetoresistance (TMR) ratio and differential conductance spectra for the parallel magnetic configuration exhibited clear dependence on the inserted Mg-Al thickness. A slight Mg-Al insertion (thickness < 0.1 nm) was effective for obtaining a large TMR ratio above 200% at room temperature and observing a distinct local minimum structure in conductance spectra. In contrast, thicker Mg-Al (> 0.2 nm) induced a reduction of TMR ratios and featureless conductance spectra, indicating a degradation of the bottom-Fe/$MgAl_{2}O_{4}$ interface. Therefore, a minimal Mg-Al insertion was found to be effective to maximize the TMR ratio for a sputtered $MgAl_{2}O_{4}$-based MTJ.
description: 16 pages, 4 figures, accepted to "AIP Advances" as conference proceeding paper (61st Annual Conference on Magnetism and Magnetic Materials, New Orleans, USA)
Multi-task dynamical systems: customising time series models
Creators: name: Bird, Alex
Publisher: name: The University of Edinburgh
Year: 2021
Subjects: time-series
multi-task learning
hierarchical model
Bayesian inference

description: Time series datasets are usually composed of a variety of sequences from the same domain, but from different entities, such as individuals, products, or organizations. We are interested in how time series models can be specialized to individual sequences (capturing the specific characteristics) while still retaining statistical power by sharing commonalities across the sequences. The major contribution of this thesis is the multi-task dynamical system (MTDS); a general methodology for extending multi-task learning (MTL) to time series models. Our approach endows dynamical systems with a set of hierarchical latent variables which can modulate all model parameters. To our knowledge, this is a novel development of MTL, and applies to time series both with and without control inputs. This thesis provides a formulation of three example MTDS models: a multi-task linear dynamical system, a multi-task recurrent neural network (RNN) and a multi-task pharmacodynamic model. The use of MTDS models is demonstrated in detail on three datasets. For a synthetic physical dataset, we demonstrate that our learning and inference algorithms are able to recover a model that is indistinguishable from the optimal one, and provide substantial improvements in prediction over gated RNN models. We apply the MTDS to motion-capture data of people walking in various styles, which results in improved performance, style transfer and the ability to morph between walking styles. Finally, using patient drug-response data, we show that our MTDS approach can result in significant improvements over modern pharmacodynamic (PD) models without deviating from the trusted PD model form.
Terza partita. La musica nell’età della tecnica – un madrigale
Creators: name: Buso, Nicola
Publisher: name: Musica/Tecnologia
Year: 2011

description: in the electroacoustic music field the writing grow weak; the action, the listening, the body memory come out; the writing become theatrical action in the collaborative live coding praxis over network: the technological action reveal itself like the root of language, of thought, of culture, like the essence of man, where history accomplish.
description: Musica/Tecnologia, V (2011)
A Blockchain-Based Architecture for Traffic Signal Control Systems
Creators: name: Li, Wanxin
name: Nejad, Mark
name: Zhang, Rui
Publisher: name: arXiv
Year: 2019
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Cryptography and Security (cs.CR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Ever-growing incorporation of connected vehicle (CV) technologies into intelligent traffic signal control systems bring about significant data security issues in the connected vehicular networks. This paper presents a novel decentralized and secure by design architecture for connected vehicle data security, which is based on the emerging blockchain paradigm. In a simulation study, we applied this architecture to defend the Intelligent Traffic Signal System (I-SIG), a USDOT approved CV pilot program, against congestion attacks. The results show the performance of the proposed architecture for the traffic signal control system.
description: This paper has been accepted at IEEE International Congress on Internet of Things (IEEE ICIOT 2019), Milan, Italy
Explicit R-matrices for inhomogeneous 3D chiral Potts models: Integrability and the action formulation for
Creators: name: Khachatryan, Sh.
name: Sedrakyan, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We construct the exact spectral parameter dependent vertex R-matrix for the classical 3D $\mathcal{N}$-state chiral Potts models, convenient for considering the model in context of the Bethe ansatz. The R-matrix is defined on the $\mathcal{N}^4$ dimensional space $V_\mathcal{N}\otimes V_\mathcal{N}\otimes V_\mathcal{N}\otimes V_\mathcal{N}$, appropriate for consideration by means of the cube-equations defined in [14]. We present the 2D quantum spin Hamiltonians for general case and, at $\mathcal{N}=2$, a fermionic lattice action representation corresponding to 3D Ising's statistical model.
description: 20 pages
Embedding SDG Literacy to Prepare Future Business Leaders forCritical Global Challenges
Creators: name: Nguyen, Lemai
name: Kaluarachchi, Chintha
name: Nagahawatta, Ruwan
Publisher: name: Deakin University
Year: 2025

description: The United Nations’ Sustainable Development Goals (SDGs) present urgent challenges that impact our global society and the planet. However, many business school students, who will be the future leaders, while gaining digital literacy, lack essential SDG knowledge to enable them to diffuse digital innovation to address the SDGs. To address this, we developed an approach to integrate SDG literacy, specifically carbon literacy, into digital business analysis teaching. This is achieved through applying our socio-ecological-technical framework, Principles for Responsible Management Education (PRME) Impactful 5 (I5), within project-based learning. The approach includes interactive workshops, industry panels and mini-hackathons, and assessment projects, engaging experts and students in developing digital sustainability initiatives. Students acquire digital and carbon literacy by specifying business and sustainability requirements of analytics tools for anonymized businesses. This paper reports a case study demonstrating how the approach empowers students to become future leaders committed to SDGs, benefiting society and the planet by diffusing digital technologies to address SDG 13. The paper contributes to IS research by showcasing the practical application and further refinement of the SET framework in IS education, thus advancing scholarship in this field. In addition, the content and teaching practices outlined in this paper will serve as valuable contributions to PRME's educational resources, supporting future initiatives in sustainability education.
Does Explainable Machine Learning Uncover the Black Box in Vision Applications?
Creators: name: Narwaria, Manish
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Machine learning (ML) in general and deep learning (DL) in particular has become an extremely popular tool in several vision applications (like object detection, super resolution, segmentation, object tracking etc.). Almost in parallel, the issue of explainability in ML (i.e. the ability to explain/elaborate the way a trained ML model arrived at its decision) in vision has also received fairly significant attention from various quarters. However, we argue that the current philosophy behind explainable ML suffers from certain limitations, and the resulting explanations may not meaningfully uncover black box ML models. To elaborate our assertion, we first raise a few fundamental questions which have not been adequately discussed in the corresponding literature. We also provide perspectives on how explainablity in ML can benefit by relying on more rigorous principles in the related areas.
description: Image and Vision Computing, Volume 118, 2022, 104353, ISSN 0262-8856, https://doi.org/10.1016/j.imavis.2021.104353
Pseudospin and Deformation-induced Gauge Field in Graphene
Creators: name: Sasaki, K.
name: Saito, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The basic properties of $π$-electrons near the Fermi level in graphene are reviewed from a point of view of the pseudospin and a gauge field coupling to the pseudospin. The applications of the gauge field to the electron-phonon interaction and to the edge states are reported.
description: 27 pages, 7 figures
Per un “Atlante della documentazione comunale”. Presentazione del progetto on line
Creators: name: De Angelis, Gianmarco
Publisher: name: Scrineum Rivista
Year: 2013
Subjects: communal documentation

description: The paper gives a short presentation of the Web-site named Atlante della documentazione comunale (secoli XII-XIV), explaining its conditions (both theoretical and operational), contents and purposes.
description: Scrineum Rivista, 6 (2009)
Theory of preparation and relaxation of a p-orbital atomic Mott insulator
Creators: name: Challis, John H.
name: Girvin, S. M.
name: Glazman, L. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We develop a theoretical framework to understand the preparation and relaxation of a metastable Mott insulator state within the first excited band of a 1D optical lattice. The state is loaded by "lifting" atoms from the ground to the first excited band by means of a stimulated Raman transition. We determine the effect of pulse duration on the accuracy of the state preparation for the case of a Gaussian pulse shape. Relaxation of the prepared state occurs in two major stages: double-occupied sites occurring due to quantum fluctuations initially lead to interband transitions followed by a spreading of particles in the trap and thermalization. We find the characteristic relaxation times at the earliest stage and at asymptotically long times approaching equilibrium. Our theory is applicable to recent experiments performed with 1D optical lattices [T. Müller, S. Fölling, A. Widera, and I. Bloch, Phys. Rev. Lett. \textbf{99}, 200405 (2007)].
description: 27 pages, 23 figures: Edited figures, added references
Translating Memories Into Words. The Speckled People  and Il cane che abbaiava alle onde
Creators: name: Armellino, Elisa
Publisher: name: Biblioteca di Studi di Filologia Moderna: Series, Journals and Workshop
Year: 2011

description: This article focuses on the memoir The Speckled People, by the Irish-German novelist Hugo Hamilton, and its Italian translation (Il cane che abbaiava alle onde) by Isabella Zani, in order to investigate how the state of verb tense and aspect in an original and its translation may influence time representation and perception. It also deals with the translation of cultural elements and with the translator's difficult task of bridging cultural differences. The instances of my investigation are made the harder to deal with by the fact that the character's language-game is played as an indicator of identity and as such it rests on the edge of untranslatability. This status does not only regard translation but influences the act of reading
description: Studi irlandesi. A Journal of Irish Studies, No 1 (2011)
Creative learning approaches for an urban design process
Creators: name: Zacharias, John
Publisher: name: University of British Columbia
Year: 2010

description: Our age is characterized by the fundamental contradiction between the increasing functional complexity of the, environment and the apparent, structural simplicity of the design process, and the designed environment. This dichotomy has made man a stranger to his own world, isolating experience from action, and restricting his behaviour in the environment. The conscious design process of today, characterized by systems, hierarchical organization, external control, and formalized rules and strategies, is no longer adequate in an era of rapid change. Self-conscious urban design as a process of giving form and meaning to the environment, has itself become meaningless. "Creativity" is identified as the primary link between experience and meaningful behaviour in designing the environment. It is characterized by responsiveness to environment and to change, openness to experience, and the open-ended synthesis of information. While creativity has been considered as the phenomenon of individual internal synthesis, it can be externalized as an urban design process following this general pattern; First, creativity can be operationalized for design purposes in every individual. Second, the environmental conditions for creativity, called "attitudes" can be designed into the environment for increased "arousal" in individuals. These include conflict, ambiguity, complexity, novelty, and expectation. These attributes transform the environment from an aesthetic field to an activity field, through the "kinaesthetic experience". Third, areas for individual creative action must be present in the environment, which is then characterized by functional flexibility, continuity of change, and design contingencies. The conscious design approaches, viz. Formalist, Heuristic, and Operating Unit are shown to be inadequate according to the above criteria. Ad hoc approaches are examined as the design approach alternative, and methods for obtaining feedback are listed that enable the ad hoc model to become responsive and creative, rather than merely palliative. Finally, the distinguishing characteristics of the learning approach to urban design are listed, with some implications for its planning future. The salient features of the approach are shown to parallel identified creative processes in government, architecture, industrial management, biology, design and technological production.
The prescribed Ricci curvature problem for naturally reductive metrics on compact Lie groups
Creators: name: Arroyo, Romina M.
name: Pulemotov, Artem
name: Ziller, Wolfgang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the problem of prescribing the Ricci curvature in the class of naturally reductive metrics on a compact Lie group. We derive necessary as well as sufficient conditions for the solvability of the equations and provide a series of examples.
description: 13 pages, 5 figures
Physics counterpart of the PT non-hermitian tight-binding chain
Creators: name: Jin, L.
name: Song, Z.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore an alternative way of finding the link between a PT non-Hermitian Hamiltonian and a Hermitian one. Based on the analysis of the scattering problem for an imaginary potential and its time reversal process, it is shown that any real-energy eigenstate of a PT tight-binding lattice with on-site imaginary potentials shares the same wave function with a resonant transmission state of the corresponding Hermitian lattice embedded in a chain. It indicates that the PT eigenstate of a PT non-Hermitian Hamiltonian has connection to the resonance transmission state of the extended Hermitian Hamiltonian.
description: 6 pages, 3 figures
`Why didn't you allocate this task to them?' Negotiation-Aware Explicable Task Allocation and Contrastive Explanation Generation
Creators: name: Zahedi, Zahra
name: Sengupta, Sailik
name: Kambhampati, Subbarao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Task allocation is an important problem in multi-agent systems. It becomes more challenging when the team-members are humans with imperfect knowledge about their teammates' costs and the overall performance metric. In this paper, we propose a centralized Artificial Intelligence Task Allocation (AITA) that simulates a negotiation and produces a negotiation-aware explicable task allocation. If a team-member is unhappy with the proposed allocation, we allow them to question the proposed allocation using a counterfactual. By using parts of the simulated negotiation, we are able to provide contrastive explanations that provide minimum information about other's cost to refute their foil. With human studies, we show that (1) the allocation proposed using our method appears fair to the majority, and (2) when a counterfactual is raised, explanations generated are easy to comprehend and convincing. Finally, we empirically study the effect of different kinds of incompleteness on the explanation-length and find that underestimation of a teammate's costs often increases it.
Spontaneous decay induced quantum dynamics in Rydberg blockaded Λ-type atoms
Creators: name: Qiao, Chang
name: Zhang, Wenxian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Strongly Rydberg-blockaded two-level atoms form a Rydberg superatom, which is excited only to a collective symmetrical Dicke state. However, emerging often in the alkali-earth atoms, the spontaneous decay from the Rydberg state to an additional pooling state renders the ensemble no longer a closed superatom. Herein we present a computationally-efficient model to characterize the interaction between a fully Rydberg-blockaded ensemble of $N$ $Λ$-type three-level atoms and a strong probe light field in a coherent state. The model enables us to achieve a decomposition of the coupled dynamics in the strong field limit, which significantly reduces the complexity of computing the $N$-body system evolution and paves a way for practical analysis in experiments. A quasi-steady-state power spectrum with multiple sidebands is found in the scattered field. The relative heights of the sidebands show a time dependence determined by the atomic relaxation, which illuminates potential applications of using the system in information transfer of quantum networks. With negligible dissipative flipping to the unsymmetrical states, the atomic relaxation time indicating a linearly increasing pooling state fraction is derived analytically as a function of the atom number.
Exact Analysis of Scaling and Dominant Attractors Beyond the Exponential Potential
Creators: name: Fang, Wei
name: Li, Ying
name: Zhang, Kai
name: Lu, Hui-Qing
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By considering the potential parameter $Γ$ as a function of another potential parameter $λ$[47], We successfully extend the analysis of two-dimensional autonomous dynamical system of quintessence scalar field model to the analysis of three-dimension, which makes us be able to research the critical points of a large number of potentials beyond the exponential potential exactly. We find that there are ten critical points in all, three points $P_{3, 5, 6}$} are general points which are possessed by all quintessence models regardless of the form of potentials and the rest points are closely connected to the concrete potentials. It is quite surprising that, apart from the exponential potential, there are a large number of potentials which can give the scaling solution when the function $f(λ)(=Γ(λ)-1)$ equals zero for one or some values of $λ_{*}$ and if the parameter $λ_{*}$ also satisfies the condition Eq.(16) or Eq.(17) at the same time. We give the differential equations to derive these potentials $V(ϕ)$ from $f(λ)$. We also find that, if some conditions are satisfied, the de-Sitter-like dominant point $P_4$ and the scaling solution point $P_9$(or $P_{10}$) can be stable simultaneously but $P_9$ and $P_{10}$ can not be stable simultaneity. Although we survey scaling solutions beyond the exponential potential for ordinary quintessence models in standard general relativity, this method can be applied to other extensively scaling solution models studied in literature[46] including coupled quintessence, (coupled-)phantom scalar field, k-essence and even beyond the general relativity case $H^2 \proptoρ_T^n$. we also discuss the disadvantage of our approach.
description: 16 pages,no figure, this new revision has taken the suggestions from CQG referees and has been accepted for publication in Classical and Quantum Gravity
Virtual $χ_{-y}$-genera of Quot schemes on surfaces
Creators: name: Lim, Woonam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14N99 (primary), 14J80 (secondary)

description: This paper studies the virtual $χ_{-y}$-genera of Grothendieck's Quot schemes on surfaces, thus refining the calculations of the virtual Euler characteristics by Oprea-Pandharipande. We first prove a structural result expressing the equivariant virtual $χ_{-y}$-genera of Quot schemes universally in terms of the Seiberg-Witten invariants. The formula is simpler for curve classes of Seiberg-Witten length $N$, which are defined in the paper. By way of application, we give complete answers in the following cases: (i) arbitrary surfaces for the zero curve class, (ii) relatively minimal elliptic surfaces for rational multiples of the fiber class, (iii) minimal surfaces of general type with $p_g>0$ for any curve classes. Furthermore, a blow up formula is obtained for curve classes of Seiberg-Witten length $N$. As a result of these calculations, we prove that the generating series of the virtual $χ_{-y}$-genera are given by rational functions for all surfaces with $p_g>0$, addressing a conjecture of Oprea-Pandharipande. In addition, we study the reduced $χ_{-y}$-genera for $K3$ surfaces and primitive curve classes with connections to the Kawai-Yoshioka formula.
description: 48 pages. Reformulation of Theorem 1 for readability. Extra explanation for the mixed terms in section 2.2.3. Reference updates
Logconcave Random Graphs
Creators: name: Frieze, Alan
name: Vempala, Santosh
name: Vera, Juan
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 05C80

description: We propose the following model of a random graph on n vertices. Let F be a distribution in R_+^{n(n-1)/2} with a coordinate for every pair i$ with 1 \le i,j \le n. Then G_{F,p} is the distribution on graphs with n vertices obtained by picking a random point X from F and defining a graph on n vertices whose edges are pairs ij for which X_{ij} \le p. The standard Erdős-Rényi model is the special case when F is uniform on the 0-1 unit cube. We examine basic properties such as the connectivity threshold for quite general distributions. We also consider cases where the X_{ij} are the edge weights in some random instance of a combinatorial optimization problem. By choosing suitable distributions, we can capture random graphs with interesting properties such as triangle-free random graphs and weighted random graphs with bounded total weight.
Optimizing Structural Integrity of Fighter Aircraft Wing Stations a Finite Element Analysis Approach.pdf
Creators: name: Haider, Aun
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 400102
subject: Aerospace structures

description: Modern fighter aircraft are equipped with multiple stations on the fuselage and under the wings to accommodate various external stores, both jettisonable and non-jettisonable. Each configuration undergoes airworthiness certification, including structural analysis of individual stations within the carriage flight envelope. This study focuses on the structural analysis of a fighter aircraft wing station within this specified envelope. To perform this analysis, the wing station is extracted from the comprehensive global wing model, creating a sub-model with equivalent stiffness properties. Utilizing ANSYS Workbench®, Finite Element Analysis (FEA) is conducted for critical load cases to determine the Factor of Safety (FoS). The initial analysis reveals that the wing station has an FoS of 1.2 under the maximum design load. Prestressed modal and buckling analyses indicate a 10% increase in stiffness due to stress-stiffening effects. To further enhance load-carrying capacity, parametric design changes are introduced. Increasing the bolt diameter from 8 mm to 10 mm raises the FoS to 1.33, resulting in an 8% increase in the maximum load-carrying capacity of the wing station. This comprehensive approach, employing FEA, ensures the wing’s structural integrity under static load conditions within the carriage envelope. The study’s findings support the wing station’s enhanced performance and contribute to safer and more efficient aircraft operations.
Titoli di studio e abilitazione all’esercizio della professione medico-chirurgica a Napoli (secoli XIII-XIX)
Creators: name: Jungano, Renato
name: Acierno, Antonia Maria
Publisher: name: Nuova Rivista di Storia della Medicina
Year: 2021

description: Il conferimento dell’abilitazione all’esercizio della profes-sione medico-chirurgica è stato caratterizzato durante i se-coli da significative trasformazioni legate alla politica dei governi e alle mutevoli esigenze delle società in progresso. Viene preso in considerazione il caso di Napoli, come circoscrizione giurisdizionale, in quanto – in tale merito – la vasta serie dei provvedimenti legislativi accertati costituisce un antefatto ben documentato circa l’evoluzione della specifica legislazione in relazione ai periodi succedutisi nel corso della storia. Tale documenta-zione appare interessante poiché compendia in una serie di norme i cambiamenti nell’interazione dei medici e dei chirurghi con la società, da un lato, e con le istituzioni, dall’altro: Napoli, quindi, regno autonomo prima e città italiana in seguito, come testimonianza del divenire della figura del medico-chirurgo da filosofo cattolico a professionista e ufficiale dello Stato. Nell’esame dell’iter legislativo relativo all’abilitazione all’esercizio della professione medica vengono analizzati i seguenti aspetti: le strutture abilitate al conferimento del ti-tolo; il valore dei titoli collegiali, universitari e statali; i regolamenti collegiali e universitari e le classi di laurea (medicina e chirurgia).
description: Nuova Rivista di Storia della Medicina, Vol 2 No 2 (2021)
Quarkyonic Matter and the Revised Phase Diagram of QCD
Creators: name: McLerran, Larry
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: At high baryon number density, it has been proposed that a new phase of QCD matter controls the physics. This matter is confining but can have densities much larger than $Λ^3_{QCD}$ QCD. Its existence is argued from large Nc approximations, and model computations. It is approximately chirally symmetric.
description: 4 pages, 1 figure - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee
The capital asset pricing model and the probability of bankruptcy: theory and empirical tests.
Creators: name: Turnbull, Stuart McLean,
Publisher: name: University of British Columbia
Year: 2010

description: Empirical evidence shows that the Capital Asset Pricing Model (CAPM) is misspecified. Securities of low systematic risk consistently earn more than predicted by the model, the reverse being true for securities of high systematic risk. Whilst the relationship between ex-post returns and systematic risk appears to be linear, the estimated regression coefficients are significantly different from their theoretic values. Various attempts to explain theoretically the causes of the misspecification have been explored, but fail to provide an adequate explanation of all the observed deficiencies. The dissertation examines how the mechanism of bankruptcy affects the structure of returns for corporate financial assets. The hypothesis of the thesis is that the probability of bankruptcy across securities and across time is reflected in the residual return after abstracting from the market. Using stochastic control theory, a two variable extended form of the continuous time analogue of the CAPM is derived. The second variable is associated with the probability of bankruptcy. The model provides a natural explanation of the deficiencies of the CAPM. A discrete time ex-post formulation of the model is used to test empirically the hypothesis. This necessitates being able to measure the probability of bankruptcy. A model formulated in terms of a firm's ability to raise funds, either internally or externally, to cover fixed charges is developed, and the probability of bankruptcy estimated using the maximum likelihood methodologies of logit analysis and probit analysis. The ability of the model to predict bankruptcy is tented on a secondary sample of bankrupt firms. Excellent results are obtained with the model predicting bankruptcy, for some firms, four or five years before the actual occurrence. Using a pooling of time series and cross section data to estimate the coefficients of the regression equation representing the hypothesis, evidence is found indicating that bankruptcy is an explanatory factor of common stock returns.
Tecnologie e composizione: alcune riflessioni
Creators: name: Solbiati, Alessandro
Publisher: name: Musica/Tecnologia
Year: 2010

description: Alessandro Solbiati considers the values of computer music in terms of musical education, setting out the innovative elements through the filter of the analysis of his experience in relation to technology. Even in his case, the centrality of the composer – and the need for the technological contribution will always be ‘controlled’ by the composer’s vision and the compositional thought – is reaffirmed.
description: Musica/Tecnologia, IV (2010)
Penetration depth, lower critical fields, and quasiparticle conductivity in Fe-arsenide superconductors
Creators: name: Shibauchi, T.
name: Hashimoto, K.
name: Okazaki, R.
name: Matsuda, Y.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this article, we review our recent studies of microwave penetration depth, lower critical fields, and quasiparticle conductivity in the superconducting state of Fe-arsenide superconductors. High-sensitivity microwave surface impedance measurements of the in-plane penetration depth in single crystals of electron-doped PrFeAsO1-y (y~0.1) and hole-doped Ba1-xKxFe2As2 (x~0.55) are presented. In clean crystals of Ba1-xKxFe2As2, as well as in PrFeAsO1-y crystals, the penetration depth shows flat temperature dependence at low temperatures, indicating that the superconducting gap opens all over the Fermi surface. The temperature dependence of superfluid density in both systems is most consistent with the existence of two different gaps. In Ba1-xKxFe2As2, we find that the superfluid density is sensitive to degrees of disorder inherent in the crystals, implying unconventional impurity effect. We also determine the lower critical field $H_{c1}$ in PrFeAsO1-y by using an array of micro-Hall probes. The temperature dependence of $H_{c1}$ saturates at low temperatures, fully consistent with the superfluid density determined by microwave measurements. The anisotropy of $H_{c1}$ has a weak temperature dependence with smaller values than the anisotropy of upper critical fields at low temperatures, which further supports the multi-gap superconductivity in Fe-arsenide systems. The quasiparticle conductivity shows an enhancement in the superconducting state, which suggests the reduction of quasiparticle scattering rate due to the gap formation below $T_c$. From these results, we discuss the structure of the superconducting gap in these Fe-arsenides, in comparison with the high-$T_c$ cuprate superconductors.
description: 12 pages, 11 figures. Review article in Physica C Special Issue on Superconductivity of Iron Pnictides
Properties of Large-Amplitude Variable Stars Detected With Two Micron All Sky Survey Public Images
Creators: name: Kouzuma, Shinjirou
name: Yamaoka, Hitoshi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a catalogue of variable stars in the near-infrared wavelength detected with overlapping regions of the 2MASS public images, and discuss their properties. The investigated region is in the direction of the Galactic center (-30 < l < 20, |b| < 20), which covers the entire bulge. We have detected 136 variable stars, of which 6 are already-known and 118 are distributed in |b| < 5 region. Additionally, 84 variable stars have optical counterparts in DSS images. The three diagrams (colour-magnitude, light variance and colour-colour diagrams) indicate that most of the detected variable stars should be largeamplitude and long-period variables such as Mira variables or OH/IR stars. The number density distribution of the detected variable stars implies that they trace the bar structure of the Galactic bulge.
description: Published in AJ, 34 pages, 12 figures
Supplementary Information from Signature of transition to supershear rupture speed in coseismic off-fault damage zone
Creators: name: Jara, Jorge
name: Bruhat, Lucile
name: Thomas, Marion Y.
name: Antoine, Solène L.
name: Okubo, Kurama
name: Rougier, Esteban
name: Rosakis, Ares J.
name: Sammis, Charles G.
name: Klinger, Yann
name: Jolivet, Romain
name: Bhat, Harsha S.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Geophysics
subject: Mechanics

description: Most earthquake ruptures propagate at speeds below the shear wave velocity within the crust, but in some rare cases, ruptures reach supershear speeds. The physics underlying the transition of natural subshear earthquakes to supershear ones is currently not fully understood. Most observational studies of supershear earthquakes have focused on determining which fault segments sustain fully grown supershear ruptures. Experimentally cross-validated numerical models have identified some of the key ingredients required to trigger a transition to supershear speed. However, the conditions for such a transition in nature are still unclear, including the precise location of this transition. In this work, we provide theoretical and numerical insights to identify the precise location of such a transition in nature. We use fracture mechanics arguments with multiple numerical models to identify the signature of supershear transition in coseismic off-fault damage. We then cross-validate this signature with high-resolution observations of fault zone width and early aftershock distributions. We confirm that the location of the transition from subshear to supershear speed is characterized by a decrease in the width of the coseismic off-fault damage zone. We thus help refine the precise location of such a transition for natural supershear earthquakes.
Andrea Tilatti, I protocolli di Gabriele da Cremona notaio della Curia Patriarcale di Aquileia (1324-1336, 1344, 1350)
Creators: name: Olivieri, Antonio
Publisher: name: Scrineum Rivista
Year: 2013

description: Scrineum Rivista, 4 (2006-2007)
Study of the calibration method using the stars measured by the EUSO-TA telescope
Creators: name: Plebaniak, Z.
name: Przybylak, M.
name: Barghini, D.
name: Bertaina, M.
name: Bisconti, F.
name: Casolino, M.
name: Gardiol, D.
name: Lipiec, R.
name: Piotrowski, L. W.
name: Shinozaki, K.
name: Szabelski, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: EUSO-TA is a ground-based experiment, placed at Black Rock Mesa of the Telescope Array site as a part of the JEM-EUSO (Joint Experiment Missions for the Extreme Universe Space Observatory) program. The UV fluorescence imaging telescope with a field of view of about 10.6 deg x 10.6 deg consisting of 2304 pixels (36 Multi-Anode Photomultipliers, 64 pixels each) works with 2.5-microsecond time resolution. An experimental setup with two Fresnel lenses allows for measurements of Ultra High Energy Cosmic Rays in parallel with the TA experiment as well as the other sources like flashes of lightning, artificial signals from UV calibration lasers, meteors and stars. Stars increase counts on pixels while crossing the field of view as the point-like sources. In this work, we discuss the method for calibration of EUSO fluorescence detectors based on signals from stars registered by the EUSO-TA experiment during several campaigns. As the star position is known, the analysis of signals gives an opportunity to determine the pointing accuracy of the detector. This can be applied to space-borne or balloon-borne EUSO missions. We describe in details the method of the analysis which provides information about detector parameters like the shape of the point spread function and is the way to perform absolute calibration of EUSO cameras.
Computable reducibility of equivalence relations and an effective jump operator
Creators: name: Clemens, John D.
name: Coskey, Samuel
name: Krakoff, Gianni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03D25, 03D30, 03D65, 03F15

description: We introduce the computable FS-jump, an analog of the classical Friedman--Stanley jump in the context of equivalence relations on the natural numbers. We prove that the computable FS-jump is proper with respect to computable reducibility. We then study the effect of the computable FS-jump on computably enumerable equivalence relations (ceers).
Towards an Understanding of Residual Networks Using Neural Tangent Hierarchy (NTH)
Creators: name: Li, Yuqing
name: Luo, Tao
name: Yip, Nung Kwan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 68U99, 90C26, 34A45

description: Gradient descent yields zero training loss in polynomial time for deep neural networks despite non-convex nature of the objective function. The behavior of network in the infinite width limit trained by gradient descent can be described by the Neural Tangent Kernel (NTK) introduced in \cite{Jacot2018Neural}. In this paper, we study dynamics of the NTK for finite width Deep Residual Network (ResNet) using the neural tangent hierarchy (NTH) proposed in \cite{Huang2019Dynamics}. For a ResNet with smooth and Lipschitz activation function, we reduce the requirement on the layer width $m$ with respect to the number of training samples $n$ from quartic to cubic. Our analysis suggests strongly that the particular skip-connection structure of ResNet is the main reason for its triumph over fully-connected network.
description: 72 pages, 1 figure
Medieval Hebrew manuscripts version 1.0
Creators: name: EZRA, Daniel STOEKL BEN
Publisher: name: Zenodo
Year: 2021
Subjects: kraken_pytorch

description: This model for Medieval Hebrew manuscripts in Ashkenazi, Italian or Sephardi bookhand was trained on the dataset published here: https://zenodo.org/record/5167263 on top of a previous generalized model. For the editorial markup for additions, deletions, linefillers and abbreviations see the article by Stökl Ben Ezra, Daniel; Brown-DeVost, Bronson; Jablonski, Pawel; Kiessling, Benjamin; Lolli, Elena; Lapin, Hayim: "BiblIA - a general model for Medieval Hebrew manuscripts and an open annotated dataset published in The 6th International Workshop on Historical Document Imaging and Processing (HIP '21) (HIP@ICDAR), Lausanne, Switzerland, September 5-6, 2021. Corresponding segmentation models can be found here: https://github.com/dstoekl/sofer_mahir This work was funded by the projects Scripta-PSL, Biblissima+ (Équipex ANR-11-EQPX-0007), Resilience (Horizon 2020 Grant Agreement 871127), the DIM STCN of the Ile-de-France and in particular Sofer Mahir.