cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Von Medien, Übertragungen und Automaten
Creators: name: Barberi, Alessandro
Publisher: name: Medienimpulse
Year: 2016

description: Im Zuge der Debatten zum Medialen Habitus wurde vielfach betont, dass die >Theorie der Praxis< von Pierre Bourdieu aus unterschiedlichen Gründen als Referenz medienpädagogischer Argumentationen und Ansätze herangezogen werden kann. Weniger oft wurde dabei betont, dass sich die Bourdieusche Bildungssoziologie selbst als eine Medientheorie begreifen lässt. Dabei zeigt eine eingehende Auseinandersetzung mit den Schriften Bourdieus, dass er an mehreren Stellen den Begriff des Mediums verwendet hat und mithin von einer >praxeologischen Medientheorie< des Medialen Habitus avant la lettre gesprochen werden kann. Dieser Artikel untersucht – ausgehend von den Debatten zur "Medienkompetenz" – wie Bourdieu Sprache, Sprechen und Diskurs, sowie Akteure, Felder und Habitus als Medien begreift und betont dabei die Nützlichkeit der Bourdieuschen Bildungssoziologie im Rahmen einer sozialwissenschaftlichen Grundlegung der Medienpädagogik.
description: Medienimpulse, Bd. 51 Nr. 4 (2013): 4/2013 - Medialer Habitus
Tensor Methods in Computer Vision and Deep Learning
Creators: name: Panagakis, Yannis
name: Kossaifi, Jean
name: Chrysos, Grigorios G.
name: Oldfield, James
name: Nicolaou, Mihalis A.
name: Anandkumar, Anima
name: Zafeiriou, Stefanos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Tensors, or multidimensional arrays, are data structures that can naturally represent visual data of multiple dimensions. Inherently able to efficiently capture structured, latent semantic spaces and high-order interactions, tensors have a long history of applications in a wide span of computer vision problems. With the advent of the deep learning paradigm shift in computer vision, tensors have become even more fundamental. Indeed, essential ingredients in modern deep learning architectures, such as convolutions and attention mechanisms, can readily be considered as tensor mappings. In effect, tensor methods are increasingly finding significant applications in deep learning, including the design of memory and compute efficient network architectures, improving robustness to random noise and adversarial attacks, and aiding the theoretical understanding of deep networks. This article provides an in-depth and practical review of tensors and tensor methods in the context of representation learning and deep learning, with a particular focus on visual data analysis and computer vision applications. Concretely, besides fundamental work in tensor-based visual data analysis methods, we focus on recent developments that have brought on a gradual increase of tensor methods, especially in deep learning architectures, and their implications in computer vision applications. To further enable the newcomer to grasp such concepts quickly, we provide companion Python notebooks, covering key aspects of the paper and implementing them, step-by-step with TensorLy.
description: Proceedings of the IEEE (2021)
Time-Reversal Symmetry Breaking and Spontaneous Anomalous Hall Effect in Fermi Fluids
Creators: name: Sun, Kai
name: Fradkin, Eduardo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the spontaneous non-magnetic time-reversal symmetry breaking in a two-dimensional Fermi liquid without breaking either the translation symmetry or the U(1) charge symmetry. Assuming that the low-energy physics is described by fermionic quasiparticle excitations, we identified an "emergent" local $U(1)^N$ symmetry in momentum space for an $N$-band model. For a large class of models, including all one-band and two-band models, we found that the time-reversal and chiral symmetry breaking can be described by the $U(1)^N$ gauge theory associated with this emergent local $U(1)^N$ symmetry. This conclusion enables the classification of the time-reversal symmetry-breaking states as types I and II, depending on the type of accompanying spatial symmetry breaking. The properties of each class are studied. In particular, we show that the states breaking both time-reversal and chiral symmetries are described by spontaneously generated Berry phases. We also show examples of the time-reversal symmetry-breaking phases in several different microscopically motivated models and calculate their associated Hall conductance within a mean-field approximation. The fermionic nematic phase with time-reversal symmetry breaking is also presented and the possible realizations in strongly correlated models such as the Emery model are discussed.
description: 18 pages, 8 figures
การพัฒนาระบบสอนเสริมอัจฉริยะบนฐานการทดสอบแบบปรับเหมาะสำหรับการเรียนรู้การเขียนโปรแกรมคอมพิวเตอร์
Creators: name: เอกราช ธรรมษา
Publisher: name: หน่วยวิจัยวิทยาศาสตร์ เทคโนโลยี และสิ่งแวดล้อมเพื่อการเรียนรู้ คณะวิทยาศาสตร์ มหาวิทยาลัยศรีนครินทรวิโรฒ
Year: 2564
Subjects: ระบบสอนเสริมอัจฉริยะ
กระบวนการจัดการเรียนรู้
การเขียนโปรแกรมคอมพิวเตอร์
การทดสอบแบบปรับเหมาะ

description: วารสารหน่วยวิจัยวิทยาศาสตร์ เทคโนโลยี และสิ่งแวดล้อมเพื่อการเรียนรู้ (JSTEL), 12, 2, 218-237
Rezension: Filmgeschichte als Diskursgeschichte. Die RAF im deutschen Spielfilm von Julia Schumacher
Creators: name: Barberi, Alessandro
Publisher: name: Medienimpulse
Year: 2013

description: Julia Schumacher hat die Repräsentationen der RAF in der deutschen Kinogeschichte im Sinne einer Diskursanalyse als Diskursgeschichte untersucht. Filme werden dabei als Quellen historischer Quellen untersucht. Der Chefredakteur der MEDIENIMPULSE hat ihre Analyse für unsere LeserInnen rezensiert.
description: Medienimpulse, Bd. 50 Nr. 4 (2012): 4/2012 - Soziale und Mediale Räume
Von Fotografien, Televisionen und symbolischen Maschinen
Creators: name: Barberi, Alessandro
Publisher: name: Medienimpulse
Year: 2016

description: Alessandro Barberi unterzieht die Schriften Pierre Bourdieus hinsichtlich der Debatten zum Medialen Habitus einem Close Reading und betont auch im zweiten Teil seiner Untersuchungen, dass Bourdieus Bildungssoziologie als eine praxeologische Medientheorie begriffen werden kann.
description: Medienimpulse, Bd. 52 Nr. 1 (2014): 1/2014 - Display/Aktuelle Dynamiken und Herausforderungen kuratorischer und vermittelnder Praxis
Cut! Von der Praxis der Grammatologie: Skripturalität in David Finchers SE7EN (1995)
Creators: name: Barberi, Alessandro
Publisher: name: Medienimpulse
Year: 2018

description: Alessandro Barberi unterzieht David Finchers Serial-Killer-Film SE7EN (1995) einer eingehenden praxeologischen und grammatologischen Analyse und zeigt so, dass selbst ein (fehlender) Querstrich auf der Leinwand zwischen Sinn und Wahnsinn bedeutsam ist. Dabei ist es vor allem das Paradigma der Hand, der Handarbeit und der Handschrift, das es möglich werden lässt, vom Titel weg und im ganzen Film auf der Leinwand eine Theorie der Handlungsorientierung zu isolieren, die medienpädagogisch von Bedeutung ist.
description: Medienimpulse, Bd. 55 Nr. 4 (2017): 4/2017 - Kreativität/Ko-Kreativität
Majorana Gap Formation in the Anisotropic Kitaev Model with Ordered Flux Configuration
Creators: name: Hashimoto, Akihiro
name: Murakami, Yuta
name: Koga, Akihisa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the Kitaev model with direction dependent interactions to investigate how the flux configuration and/or the anisotropy in the exchanges affect the Majorana excitations. Systematic numerical calculations demonstrate how the anisotropy of the exchange couplings and flux configuration make the Majorana excitation gapped. The induced gapped quantum spin liquid states are distinct from the gapped one realized in the large anisotropic limit. The nature of gapped states can be explained by the superlattice potential due to flux configuration.
description: 9 pages, 12 figures
Radio astronomy and Space science in Azores: enhancing the Atlantic VLBI infrastructure cluster
Creators: name: Barbosa, Domingos
name: Coelho, Bruno
name: Antón, Sonia
name: Bergano, Miguel
name: Boekholt, Tjarda
name: Correia, Alexandre C. M.
name: Maia, Dalmiro
name: Pandeirada, João
name: Ribeiro, Valério
name: Adams, Jason
name: Barraca, João Paulo
name: Gomes, Diogo
name: Morgado, Bruno
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Radio astronomy and Space Infrastructures in the Azores have a great scientific and industrial interest because they benefit from a unique geographical location in the middle of the North Atlantic allowing a vast improvement in the sky coverage. This fact obviously has a very high added value for: i) the establishment of space tracking and communications networks for the emergent global small satellite fleets ii) it is invaluable to connect the radio astronomy infrastructure networks in Africa, Europe and America continents using Very Large Baseline Interferometry (VLBI) techniques, iii) it allows excellent potential for monitoring space debris and Near Earth Objects (NEOs). There is in S. Miguel island a 32-metre SATCOM antenna that could be integrated in advanced VLBI networks and be capable of additional Deep Space Network ground support. This paper explores the space science opportunities offered by the upgrade of the S. Miguel 32-metre SATCOM antenna into a world-class infrastructure for radio astronomy and space exploration: it would enable a Deep Space Network mode and would constitute a key space facility for data production, promoting local digital infrastructure investments and the testing of cutting-edge information technologies. Its Atlantic location also enables improvements in angular resolution, provides many baseline in East-West and North-South directions connecting the emergent VLBI stations in America to Europe and Africa VLBI arrays therefore contributing for greater array imaging capabilities especially for sources or well studied fields close to or below the celestial equator, where ESO facilities, ALMA, SKA and its precursors do or will operate and observe in the coming decades.
description: 14 pages, 7 figures, 3 tables. Accepted for Publication at Advances in Space Research, COSPAR, Elsevier
A Yang-Baxter integrable cellular automaton with a four site update rule
Creators: name: Pozsgay, Balázs
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We present a one dimensional reversible block cellular automaton, where the time evolution is dictated by a period 3 cycle of update rules. At each time step a subset of the cells is updated using a four site rule with two control bits and two action bits. The model displays rich dynamics. There are three types of stable particles, left movers, right movers and "frozen" bound states that only move as an effect of scattering with the left and right movers. Multi-particle scattering in the system is factorized. We embed the model into the canonical framework of Yang-Baxter integrability by rigorously proving the existence of a commuting set of diagonal-to-diagonal transfer matrices. The construction involves a new type of Lax operator.
description: 16 pages, v2: references added
Transportation dynamics of dielectric particles with the gradient forces in the field of orthogonal standing laser waves
Creators: name: Afanas'ev, A. A.
name: Volkov, V. M.
name: Kurochkin, Yu. A.
name: Novitsky, D. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We develop the theory of transportation and localization of a transparent dielectric spherical particle with the gradient forces in the interference field of orthogonally directed standing laser waves $E_z (\cos kz)$ and $E_x (\cos kx)$. It is shown that, when the waves $E_z$ and $E_x$ are coherent, the interference radiation field contains two harmonic components with the periods $Λ_0=π/k$ and $Λ_Δ=π/(k \sin (π/4))$. The amplitudes of the gradient force components depend on the ratio of the particle radius $R$ to the modulation periods due to inhomogeneity of radiation in the particle volume and are given by the Bessel functions $J_{3/2} (2 πR/Λ_0)$ and $J_{3/2} (2 πR/Λ_Δ)$. We find the critical particle radii $R_0$ and $R_Δ=\sqrt{2} R_0$ defined by the Bessel functions zeros and corresponding to the vanishing components of the gradient forces. In particular, for the radiation with the wavelength $λ_0=1.064$ μm and a particle in water, the smallest critical radii are $R_0=0.286$ $μ$m and $0.492$ μm and $R_Δ=0.404$ $μ$m and $0.696$ $μ$m, respectively. For a number of special cases, we obtain the analytical solutions of the Newton equations and the particle trajectories that depend on the ratio of wave intensities and the particle radius. The results can be used to study the dynamics of the "optical assembly" of a two-dimensional particles matrix which behaves as a molecular crystal.
description: 12 pages, 4 figures
Calculation of electron-positron production in supercritical uranium-uranium collisions near the Coulomb barrier
Creators: name: Ackad, Edward
name: Horbatsch, Marko
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The time-dependent Dirac equation was solved for zero-impact-parameter bare U-U collisions in the monopole approximation using a mapped Fourier grid matrix representation. A total of 2048 states including bound, as well as positive- and negative-energy states for an N=1024 spatial grid were propagated to generate occupation amplitudes as a function of internuclear separation. From these amplitudes spectra were calculated for total inclusive positron and electron production, and also the correlated spectra for ($e^+,e^-$) pair production. These were analyzed as a function of nuclear sticking time in order to establish signatures of spontaneous pair creation, i.e., QED vacuum decay. Subcritical Fr-Fr and highly supercritical Db-Db collisions both at the Coulomb barrier were also studied and contrasted with the U-U results.
description: 20 pages, 4 pages
The Influence of Horizontal Boundaries on Ekman Circulation and Angular Momentum Transport in a Cylindrical Annulus
Creators: name: Obabko, Aleksandr V.
name: Cattaneo, Fausto
name: Fischer, Paul F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present numerical simulations of circular Couette flow in axisymmetric and fully three-dimensional geometry of a cylindrical annulus inspired by Princeton MRI liquid gallium experiment. The incompressible Navier-Stokes equations are solved with the spectral element code Nek5000 incorporating realistic horizontal boundary conditions of differentially rotating rings. We investigate the effect of changing rotation rates (Reynolds number) and of the horizontal boundary conditions on flow structure, Ekman circulation and associated transport of angular momentum through the onset of unsteadiness and three-dimensionality. A mechanism for the explanation of the dependence of the Ekman flows and circulation on horizontal boundary conditions is proposed.
description: 23 pages, 7 figures; to be published in the Topical Issue of the Physica Scripta in 2008
Bi-collinear antiferromagnetic order in the tetragonal $α$-FeTe
Creators: name: Ma, Fengjie
name: Ji, Wei
name: Hu, Jiangping
name: LU, Zhong-Yi
name: Xiang, Tao
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: By the first-principles electronic structure calculations, we find that the ground state of PbO-type tetragonal $α$-FeTe is in a bi-collinear antiferromagnetic state, in which the Fe local moments ($\sim2.5μ_B$) are ordered ferromagnetically along a diagonal direction and antiferromagnetically along the other diagonal direction on the Fe square lattice. This bi-collinear order results from the interplay among the nearest, next nearest, and next next nearest neighbor superexchange interactions $J_1$, $J_2$, and $J_3$, mediated by Te $5p$-band. In contrast, the ground state of $α$-FeSe is in the collinear antiferromagnetic order, similar as in LaFeAsO and BaFe$_2$As$_2$.
description: 5 pages and 5 figures
Unveiling the Cyclicity of Monodromic Tangential Singularities: Insights Beyond the Pseudo-Hopf Bifurcation
Creators: name: Novaes, Douglas D.
name: Silva, Leandro A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34C23, 34A36, 37G15

description: The cyclicity problem, crucial in analyzing planar vector fields, consists in estimating the number of limit cycles emanating from monodromic singularities. Traditionally, this estimation relies on Lyapunov coefficients. However, in nonsmooth systems, besides the limit cycles bifurcating by varying the Lyapunov coefficients, monodromic singularities on the switching curve can always be split apart yielding, under suitable conditions, a sliding region and an additional limit cycle surrounding it. This bifurcation phenomenon, known as pseudo-Hopf bifurcation, has enhanced lower-bound cyclicity estimations for monodromic singularities in Filippov systems. In this study, we push beyond the pseudo-Hopf bifurcation, demonstrating that the destruction of $(2k,2k)$-monodromic tangential singularities yields at least $k$ limit cycles surrounding sliding segments. This new bifurcation phenomenon expands our understanding of limit cycle bifurcations in nonsmooth systems and, in addition to the theoretical significance, has practical relevance in various applied models involving switches and abrupt processes.
Generic regularity of differentiated product oligopolies
Creators: name: Zierhut, Michael
Publisher: name: Humboldt-Universität zu Berlin
Year: 2020
Subjects: subject: Comparative statics
subject: Imperfect competition
subject: Cournot–Walras equilibrium
subject: Regular production economy
subject: 330 Wirtschaft
subject: 510 Mathematik

description: In oligopoly models with differentiated products, producers face a market demand function that reflects the preferences of consumers. However, typical assumptions on preferences place only weak restrictions on the shape of aggregate demand. This may result in profit functions that are not strictly quasiconcave, in best-reply correspondences that are not differentiable, and in equilibria that are not robust to perturbations. This paper establishes differentiability and robustness as a generic property: for an open, dense set of economies, best replies are differentiable in a neighborhood of equilibria, which is a precondition for comparative statics. All these economies have a finite number of equilibria in pure strategies.
3-of-3 Multisignature Approach for Enabling Lightning Network Micro-payments on IoT Devices
Creators: name: Kurt, Ahmet
name: Mercan, Suat
name: Erdin, Enes
name: Akkaya, Kemal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Bitcoin's success as a cryptocurrency enabled it to penetrate into many daily life transactions. Its problems regarding the transaction fees and long validation times are addressed through an innovative concept called the Lightning Network (LN) which works on top of Bitcoin by leveraging off-chain transactions. This made Bitcoin an attractive micro-payment solution that can also be used within certain IoT applications (e.g., toll payments) since it eliminates the need for traditional centralized payment systems. Nevertheless, it is not possible to run LN and Bitcoin on resource-constrained IoT devices due to their storage, memory, and processing requirements. Therefore, in this paper, we propose an efficient and secure protocol that enables an IoT device to use LN's functions through a gateway LN node even if it is not trusted. The idea is to involve the IoT device only in signing operations, which is possible by replacing LN's original 2-of-2 multisignature channels with 3-of-3 multisignature channels. Once the gateway is delegated to open a channel for the IoT device in a secure manner, our protocol enforces the gateway to request the IoT device's cryptographic signature for all further operations on the channel such as sending payments or closing the channel. LN's Bitcoin transactions are revised to incorporate the 3-of-3 multisignature channels. In addition, we propose other changes to protect the IoT device's funds from getting stolen in possible revoked state broadcast attempts. We evaluated the proposed protocol using a Raspberry Pi considering a toll payment scenario. Our results show that timely payments can be sent and the computational and communication delays associated with the protocol are negligible.
description: This is the arXiv copy of the published journal paper, see https://www.itu.int/pub/S-JNL-VOL2.ISSUE5-2021-A05. arXiv admin note: text overlap with arXiv:2012.10576
Expertengespräch 1: Von Vermittlungen und politischen Inszenierungen
Creators: name: Barberi, Alessandro
Publisher: name: Medienimpulse
Year: 2011

description: Expertengespräch 1
description: Medienimpulse, Bd. 49 Nr. 1 (2011): 1/2011 - Politik/Macht/Medien
Expertengespräch 2: Von medialen Inszenierungen und "fiesen Tricks"
Creators: name: Barberi, Alessandro
Publisher: name: Medienimpulse
Year: 2011

description: Expertengespräch 2
description: Medienimpulse, Bd. 49 Nr. 1 (2011): 1/2011 - Politik/Macht/Medien
Spaces with a Finite Family of Basic Functions
Creators: name: Gartside, Paul
name: Ziqin, Feng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 26B40, 54C30; 54C35, 54E45

description: A space X is finite dimensional, locally compact and separable metrizable if and only if X has a finite basic family: continuous functions Phi_1,...,Phi_n of X to the reals, R, such that for all continuous f from X to R there are g_1,..., g_n in C(R) satisfying f(x)=g_1(Phi_1(x))+g_2(Phi_2(x))+...+g_n(Phi_n(x)) for all x in X. This give the complete solution to four problems on basic functions posed by Sternfeld, as well as questions posed by Hattori and others.
Growing integer partitions with uniform marginals and the equivalence of partition ensembles
Creators: name: Yakubovich, Yuri
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 05A17 (Primary) 60J27, 60J10, 60F05

description: We present an explicit construction of a Markovian random growth process on integer partitions such that given it visits some level $n$, it passes through any partition $λ$ of $n$ with equal probabilities. The construction has continuous time, but we also investigate its discrete time jump chain. The jump probabilities are given by explicit but complicated expressions, so we find their asymptotic behavior as the partition becomes large. This allows us to explain how the limit shape is formed.
 Using the known connection of the considered probabilistic objects to Poisson point processes, we give an alternative description of the partition growth process in these terms. Then we apply the constructed growth process to find sufficient conditions for a phenomenon known as equivalence of two ensembles of random partitions for a finite number of partition characteristics. This result allows to show that counts of odd and even parts in a random partition of $n$ are asymptotically independent as $n\to\infty$ and to find their limiting distributions, which are, somewhat surprisingly, different.
description: 32 pages. Dedicated to the memory of Anatoly Vershik
WP2 Mapping of Agroecology Living Labs and research infrastructures : Interview guidelines
Creators: name: Berg, Torsten Rødel
Publisher: name: Zenodo
Year: 2021

description: Work package 2 aims to map and analyse research infrastructures, living labs and open innovation arrangements, along with polices and funding arrangements across Europe, that are linked to agroecology transition. This is with the ambition to gain an overview of the ‘landscape’ and understand enablers, barriers and incentives for innovation for agroecology transition.
Characterizing Improper Input Validation Vulnerabilities of Mobile Crowdsourcing Services
Creators: name: Khan, Sojhal Ismail
name: Woszczyk, Dominika
name: You, Chengzeng
name: Demetriou, Soteris
name: Naveed, Muhammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Mobile crowdsourcing services (MCS), enable fast and economical data acquisition at scale and find applications in a variety of domains. Prior work has shown that Foursquare and Waze (a location-based and a navigation MCS) are vulnerable to different kinds of data poisoning attacks. Such attacks can be upsetting and even dangerous especially when they are used to inject improper inputs to mislead users. However, to date, there is no comprehensive study on the extent of improper input validation (IIV) vulnerabilities and the feasibility of their exploits in MCSs across domains. In this work, we leverage the fact that MCS interface with their participants through mobile apps to design tools and new methodologies embodied in an end-to-end feedback-driven analysis framework which we use to study 10 popular and previously unexplored services in five different domains. Using our framework we send tens of thousands of API requests with automatically generated input values to characterize their IIV attack surface. Alarmingly, we found that most of them (8/10) suffer from grave IIV vulnerabilities which allow an adversary to launch data poisoning attacks at scale: 7400 spoofed API requests were successful in faking online posts for robberies, gunshots, and other dangerous incidents, faking fitness activities with supernatural speeds and distances among many others. Lastly, we discuss easy to implement and deploy mitigation strategies which can greatly reduce the IIV attack surface and argue for their use as a necessary complementary measure working toward trustworthy mobile crowdsourcing services.
Privacy-preserving machine learning for healthcare: open challenges and future perspectives
Creators: name: Guerra-Manzanares, Alejandro
name: Lopez, L. Julian Lechuga
name: Maniatakos, Michail
name: Shamout, Farah E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Machine Learning (ML) has recently shown tremendous success in modeling various healthcare prediction tasks, ranging from disease diagnosis and prognosis to patient treatment. Due to the sensitive nature of medical data, privacy must be considered along the entire ML pipeline, from model training to inference. In this paper, we conduct a review of recent literature concerning Privacy-Preserving Machine Learning (PPML) for healthcare. We primarily focus on privacy-preserving training and inference-as-a-service, and perform a comprehensive review of existing trends, identify challenges, and discuss opportunities for future research directions. The aim of this review is to guide the development of private and efficient ML models in healthcare, with the prospects of translating research efforts into real-world settings.
description: ICLR 2023 Workshop on Trustworthy Machine Learning for Healthcare (TML4H)
Quantum Fidelity and Thermal Phase Transitions
Creators: name: Quan, H. T.
name: Cucchietti, F. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the quantum fidelity approach to characterize thermal phase transitions. Specifically, we focus on the mixed-state fidelity induced by a perturbation in temperature. We consider the behavior of fidelity in two types of second-order thermal phase transitions (based on the type of non-analiticity of free energy), and we find that usual fidelity criteria for identifying critical points is more applicable to the case of $λ$ transitions (divergent second derivatives of free energy). Our study also reveals limitations of the fidelity approach: sensitivity to high temperature thermal fluctuations that wash out information about the transition, and inability of fidelity to distinguish between crossovers and proper phase transitions. In spite of these limitations, however, we find that fidelity remains a good pre-criterion for testing thermal phase transitions, which we use to analyze the non-zero temperature phase diagram of the Lipkin-Meshkov-Glick model.
Keep it Simple: Unsupervised Simplification of Multi-Paragraph Text
Creators: name: Laban, Philippe
name: Schnabel, Tobias
name: Bennett, Paul
name: Hearst, Marti A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This work presents Keep it Simple (KiS), a new approach to unsupervised text simplification which learns to balance a reward across three properties: fluency, salience and simplicity. We train the model with a novel algorithm to optimize the reward (k-SCST), in which the model proposes several candidate simplifications, computes each candidate's reward, and encourages candidates that outperform the mean reward. Finally, we propose a realistic text comprehension task as an evaluation method for text simplification. When tested on the English news domain, the KiS model outperforms strong supervised baselines by more than 4 SARI points, and can help people complete a comprehension task an average of 18% faster while retaining accuracy, when compared to the original text. Code available: https://github.com/tingofurro/keep_it_simple
description: Accepted at ACL-IJCNLP 2021, 14 pages, 7 figures
On the detectability of higher harmonics with LISA
Creators: name: Pitte, Chantal
name: Baghi, Quentin
name: Marsat, Sylvain
name: Besançon, Marc
name: Petiteau, Antoine
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Supermassive black hole binaries (SMBHBs) are expected to be detected by the future space-based gravitational-wave detector LISA with a large signal-to-noise ratio (SNR). This prospect enhances the possibility of differentiating higher harmonics in the inspiral-merger-ringdown (IMR) waveform. In this study, we test the ability of LISA to identify the presence of different modes in the IMR waveform from a SMBHB. We analyze the contribution of each mode to the total SNR for different sources. Higher modes, in particular the mode $(3, 3)$ and $(4, 4)$, can dominate the signal observed through the LISA detector for SMBHB of the order of $10^8 M_\odot$. With Bayesian analysis, we can discriminate models with different harmonics. While spherical harmonics are often considered orthogonal, we observe it is not the case in the merger-ringdown phase observed by LISA. Omitting harmonics not only diminishes the SNR but can also lead to biased parameter estimates. We analyze the bias for each model in a source example and quantify the threshold SNR where we can expect the parameter bias to be comparable to the statistical error. By computing the waveform model error with the Fisher approximation and comparing it with the posterior distribution from our sampler results, we can evaluate the veracity of the analytical bias, which converges with the sampler results as more harmonics are introduced. To conclude, SMBHB events with SNR of a few hundred, as expected in LISA, are required to use templates with at least modes $(2, 2)$, $(2, 1)$, $(3, 3)$, $(3, 2)$, $(4, 4)$, $(4, 3)$ to estimate all intrinsic parameters correctly. Our work highlights the importance of higher modes to describe the gravitational waveform of events detected by LISA.
description: 20 pages, 13 figures, submitted to PRD
EOSC-Pillar D5.6 FAIR Research Data Management Tool Set Update
Creators: name: Candela, Leonardo
name: Frosini, Luca
name: Mangiacrapa, Francesco
name: Rouchon, Olivier
name: Le Franc, Yann
name: Toulemonde, Baptiste
Publisher: name: Zenodo
Year: 2021
Subjects: EOSC
Open Science
Research Data Management
FAIR data

description: This document is an update of D5.1, a report accompanying the delivery of the bundle of service instance(s) resulting from T5.1 and T5.2 activities. It provides a short summary of the work, the list of services and how to access them as also described in D5.2. The tool set aims at offering solutions for Research Data Management promoting the implementation of FAIR principles and practices.
Effect of Dust Size on the Near-Infrared Spectra (1.0-5.0 $μ$m) of Brown Dwarf Atmospheres
Creators: name: Sorahana, Satoko
name: Kobayashi, Hiroshi
name: Tanaka, Kyoko K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this study, we demonstrate the dependence of atmospheric dust size on the near-infrared spectra of ten L dwarfs, and constrain the sizes of dust grains in each L dwarf atmosphere. In previous studies, by comparing observed and modeled spectra, it was suggested that the deviations of their spectral shapes from theoretical prediction are general characteristics. Here, we focus on the dust size in brown dwarf atmospheres to understand the observed spectra. We confirm that changing the dust size changes the temperature-pressure structure of the atmosphere, with the shape of the spectrum changing accordingly. At the wavelength at which dust is the main absorber of radiation (the dust-dominated regime), a large dust opacity combined with a medium grain size, e.g., 0.1 $μ$m, results in a low photospheric temperature, and thus a small flux. Conversely, for the wavelength at which gas absorption is dominant (the gas-dominated regime), a large dust opacity modifies the temperature-pressure structure, resulting in a high photospheric temperature, which corresponds to large flux emissions. Taking into account the size effect, we compare the model spectral fluxes in the wavelength range 1-5 $μ$m with the observational ones to constrain the main dust size in the atmosphere of each of the ten L dwarfs observed with AKARI and SpeX or CGS4. Ultimately, we reveal that the observed data are reproduced with higher fidelity by models based on a medium dust size of 0.1-3.0 $μ$m for six of these L dwarfs; therefore, we suggest that such atmospheric dust sizes apply to the majority of L dwarfs.
description: 43 pages, 11 figures, 3 tables, Accepted for publication in ApJ
The Betti numbers of real toric varieties associated to Weyl chambers of types E7 and E8
Creators: name: Choi, Suyoung
name: Yoon, Younghan
name: Yu, Seonghyeon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57S12, 14M25, 55U10, 57N65

description: We compute the rational Betti numbers of the real toric varieties associated to Weyl chambers of types $E_7$ and $E_8$, completing the computations for all types of root systems.
description: 7 pages
Distance to NGC 281 in a Galactic Fragmenting Superbubble: Parallax Measurements with VERA
Creators: name: Sato, Mayumi
name: Hirota, Tomoya
name: Honma, Mareki
name: Kobayashi, Hideyuki
name: Sasao, Tetsuo
name: Bushimata, Takeshi
name: Choi, Yoon Kyung
name: Imai, Hiroshi
name: Iwadate, Kenzaburo
name: Jike, Takaaki
name: Kameno, Seiji
name: Kameya, Osamu
name: Kamohara, Ryuichi
name: Kan-ya, Yukitoshi
name: Kawaguchi, Noriyuki
name: Kim, Mi Kyoung
name: Kuji, Seisuke
name: Kurayama, Tomoharu
name: Manabe, Seiji
name: Matsui, Makoto
name: Matsumoto, Naoko
name: Miyaji, Takeshi
name: Nagayama, Takumi
name: Nakagawa, Akiharu
name: Nakamura, Kayoko
name: Oh, Chung Sik
name: Omodaka, Toshihiro
name: Oyama, Tomoaki
name: Sakai, Satoshi
name: Sato, Katsuhisa
name: Shibata, Katsunori M.
name: Tamura, Yoshiaki
name: Yamashita, Kazuyoshi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used the Japanese VLBI array VERA to perform high-precision astrometry of an H2O maser source in the Galactic star-forming region NGC 281 West, which has been considered to be part of a 300-pc superbubble. We successfully detected a trigonometric parallax of 0.355+/-0.030 mas, corresponding to a source distance of 2.82+/-0.24 kpc. Our direct distance determination of NGC 281 has resolved the large distance discrepancy between previous photometric and kinematic studies; likely NGC 281 is in the far side of the Perseus spiral arm. The source distance as well as the absolute proper motions were used to demonstrate the 3D structure and expansion of the NGC 281 superbubble, ~650 pc in size parallel to the Galactic disk and with a shape slightly elongated along the disk or spherical, but not vertically elongated, indicating the superbubble expansion may be confined to the disk. We estimate the expansion velocity of the superbubble as ~20 km/s both perpendicular to and parallel to the Galactic disk with a consistent timescale of ~20 Myr.
description: 16 pages, 5 figures, accepted for publication in PASJ, VERA special issue
Implications of physician manpower planning in Canada for the family physicians of British Columbia
Creators: name: Varley, John Charles
Publisher: name: University of British Columbia
Year: 2010

description: The work content and style of practice of family physicians in British Columbia has been evolving since the second world war. Since the late sixties, a reassessment of the role of family physicians has been underway, both in Canada and the United States. Primary health care has recently been given greater recognition in North America. The development of family practitioners’ tasks in the last twenty years is reviewed from the point of view of a practitioner. In Canada, the health care system has been changing since the forties, as a result of a series of federal-provincial agreements. It had become apparent that, despite constitutional deeding of health care to the provinces, federal incentives and funding were required to develop an appropriate nationwide system of health care. What was a joint private enterprise and local community sponsored health care system in the thirties, has now become a complex government-funded operation. Government involvement in third party payment schemes, for doctors particularly (the last of a series of national health insurance programs), has changed the relationship of doctors to their patients, because both became subject to the new rules of the Medical Care Act of 1967. Government involvement in payment for services has led to questions about accountability for spending. Subsequently, this led to the need for better planning, especially health manpower planning, which began to be considered very important in the early sixties. At that time, the Royal Commission on Health Services examined the prospects of bringing physicians’ services and allied health manpower services to all Canadians. The attempts to plan physician manpower in Canada and British Columbia in the sixties and seventies are considered and criticized. Conclusions are drawn regarding the prospects for future manpower planning for primary care to be given by family practitioners in British Columbia.
Can Transformer Models Measure Coherence In Text? Re-Thinking the Shuffle Test
Creators: name: Laban, Philippe
name: Dai, Luke
name: Bandarkar, Lucas
name: Hearst, Marti A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The Shuffle Test is the most common task to evaluate whether NLP models can measure coherence in text. Most recent work uses direct supervision on the task; we show that by simply finetuning a RoBERTa model, we can achieve a near perfect accuracy of 97.8%, a state-of-the-art. We argue that this outstanding performance is unlikely to lead to a good model of text coherence, and suggest that the Shuffle Test should be approached in a Zero-Shot setting: models should be evaluated without being trained on the task itself. We evaluate common models in this setting, such as Generative and Bi-directional Transformers, and find that larger architectures achieve high-performance out-of-the-box. Finally, we suggest the k-Block Shuffle Test, a modification of the original by increasing the size of blocks shuffled. Even though human reader performance remains high (around 95% accuracy), model performance drops from 94% to 78% as block size increases, creating a conceptually simple challenge to benchmark NLP models. Code available: https://github.com/tingofurro/shuffle_test/
description: Accepted at ACL-IJCNLP 2021 (short paper), 7 pages, 4 figures
A bilevel approach for compensation and routing decisions in last-mile delivery
Creators: name: Cerulli, Martina
name: Archetti, Claudia
name: Fernandez, Elena
name: Ljubic, Ivana
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In last-mile delivery logistics, peer-to-peer logistic platforms play an important role in connecting senders, customers, and independent carriers to fulfill delivery requests. Since the carriers are not under the platform's control, the platform has to anticipate their reactions, while deciding how to allocate the delivery operations. Indeed, carriers' decisions largely affect the platform's revenue. In this paper, we model this problem using bilevel programming. At the upper level, the platform decides how to assign the orders to the carriers; at the lower level, each carrier solves a profitable tour problem to determine which offered requests to accept, based on her own profit maximization. Possibly, the platform can influence carriers' decisions by determining also the compensation paid for each accepted request. The two considered settings result in two different formulations: the bilevel profitable tour problem with fixed compensation margins and with margin decisions, respectively. For each of them, we propose single-level reformulations and alternative formulations where the lower-level routing variables are projected out. A branch-and-cut algorithm is proposed to solve the bilevel models, with a tailored warm-start heuristic used to speed up the solution process. Extensive computational tests are performed to compare the proposed formulations and analyze solution characteristics.
Logarithmic-Regret Quantum Learning Algorithms for Zero-Sum Games
Creators: name: Gao, Minbo
name: Ji, Zhengfeng
name: Li, Tongyang
name: Wang, Qisheng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We propose the first online quantum algorithm for solving zero-sum games with $\widetilde O(1)$ regret under the game setting. Moreover, our quantum algorithm computes an $\varepsilon$-approximate Nash equilibrium of an $m \times n$ matrix zero-sum game in quantum time $\widetilde O(\sqrt{m+n}/\varepsilon^{2.5})$. Our algorithm uses standard quantum inputs and generates classical outputs with succinct descriptions, facilitating end-to-end applications. Technically, our online quantum algorithm "quantizes" classical algorithms based on the optimistic multiplicative weight update method. At the heart of our algorithm is a fast quantum multi-sampling procedure for the Gibbs sampling problem, which may be of independent interest.
description: 35 pages, 1 table, 4 algorithms. Close to the conference version. Corrected the contraints of the norm of A in Theorem 1.1 due to an error found in [v1, Theorem B.8]
Persistence of cluster structure in the ground state of $^{11}$B
Creators: name: Itagaki, Naoyuki
name: Naito, Tomoya
name: Hirata, Yuichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The persistence of $α+α+t$ cluster configuration in the ground state of $^{11}$B is discussed. The $α$ particles emitted from excited states of $^{12}$C could be utilized for cancer treatment, where the cluster states are created by a clinical proton beam on the $^{11}$B target. Although the cross section has been already available, for the nuclear structure side, whether the ground state of $^{11}$B contains the seeds of the cluster states is a crucial question, since the cluster structure may be washed out by the spin-orbit interaction, which has been known as a driving force to break the $α$ clusters. For this purpose, in addition to the basis states with cluster configurations, we include their breaking effects by employing the antisymmetrized quasi cluster model (AQCM). The inclusion of the breaking effect of $α+α+t$ cluster structure is found to contribute to the lowering of the ground-state energy by about 2 MeV. Assuming the typical three-$α$ cluster state of $^{12}$C as an equilateral triangular configuration with the relative distances of $\approx 4$ fm, the ground state of $^{11}$B is found to have a certain squared overlap with such state when a proton approaches. The third $3/2^{-}$ state has been suggested as a cluster state both theoretically and experimentally, and we confirmed the well-developed clustering.
Entanglement generation in double-$Λ$ system
Creators: name: Zhou, Ling
name: Ma, Yong Hong
name: Zhao, Xin Yu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we study the generation of entanglement in a double-$Λ$ system. Employing standard method of laser theory, we deduce the dynamic evolution equation of the two-mode field. We analyze the available entanglement criterion for double-$Λ$ system and the condition of entanglement existence. Our results show that under proper parameters, the two-mode field can entangled and amlified.