cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lafforgue pseudocharacters and parities of limits of Galois representations
Creators: name: Berger, Tobias
name: Weiss, Ariel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Let $F$ be a CM field with totally real subfield $F^+$ and let $π$ be a $C$-algebraic cuspidal automorphic automorphic representation of $\mathrm{U}(a,b)(\mathbf{A}_{F^+})$ whose archimedean components lie in the (non-degenerate limit of) discrete series. We attach to $π$ a Galois representation $R_π:\mathrm{Gal}(\overline F/ F^+)\to{}^C\mathrm{U}(a,b)(\overline{\mathbf Q}_\ell)$ such that, for any complex conjugation element $c$, $R_π(c)$ is as predicted by the Buzzard--Gee conjecture. As a corollary, we deduce that the Galois representations attached to certain irregular, $C$-algebraic (essentially) conjugate self-dual cuspidal automorphic representations of $\mathrm{GL}_n(\mathbf A_F)$ are odd in the sense of Bellaïche--Chenevier.
description: 23 pages
General twisting of algebras
Creators: name: Pena, Javier Lopez
name: Panaite, Florin
name: Van Oystaeyen, Freddy
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: We introduce the concept of pseudotwistor (with particular cases called twistor and braided twistor) for an algebra $(A, μ, u)$ in a monoidal category, as a morphism $T:A\otimes A\to A\otimes A$ satisfying a list of axioms ensuring that $(A, μ\circ T, u)$ is also an algebra in the category. This concept provides a unifying framework for various deformed (or twisted) algebras from the literature, such as twisted tensor products of algebras, twisted bialgebras and algebras endowed with Fedosov products. Pseudotwistors appear also in other topics from the literature, e.g. Durdevich's braided quantum groups and ribbon algebras. We also focus on the effect of twistors on the universal first order differential calculus, as well as on lifting twistors to braided twistors on the algebra of universal differential forms.
description: 19 pages
Jet collimation and acceleration in the giant radio galaxy NGC 315
Creators: name: Park, Jongho
name: Hada, Kazuhiro
name: Nakamura, Masanori
name: Asada, Keiichi
name: Zhao, Guang-Yao
name: Kino, Motoki
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the collimation and acceleration of the jets in the nearby giant radio galaxy NGC 315, using multifrequency Very Long Baseline Array observations and archival High Sensitivity Array and Very Large Array data. We find that the jet geometry transitions from a semi-parabolic shape into a conical/hyperbolic shape at a distance of $\approx10^5$ gravitational radii. We constrain the frequency-dependent position of the core, from which we locate the jet base. The jet collimation profile in the parabolic region is in good agreement with the steady axisymmetric force-free electrodynamic solution for the outermost poloidal magnetic field line anchored to the black hole event horizon on the equatorial plane, similar to the nearby radio galaxies M87 and NGC 6251. The velocity field derived from the asymmetry in brightness between the jet and counterjet shows gradual acceleration up to the bulk Lorentz factor of $Γ\sim 3$ in the region where the jet collimation occurs, confirming the presence of the jet acceleration and collimation zone. These results suggest that the jets are collimated by the pressure of the surrounding medium and accelerated by converting Poynting flux to kinetic energy flux. We discover limb-brightening of the jet in a limited distance range where the angular resolution of our data is sufficient to resolve the jet transverse structure. This indicates that either the jet has a stratified velocity field of fast-inner and slow-outer layers or the particle acceleration process is more efficient in the outer layer due to the interaction with the surroundings on pc-scales.
description: 32 pages, 18 figures, 5 tables, accepted for publication in ApJ
An approach to NLO QCD analysis of the semi-inclusive DIS data with modified Jacobi polynomial expansion method
Creators: name: Sissakian, A. N.
name: Shevchenko, O. Yu.
name: Ivanov, O. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is proposed the modification of the Jacobi polynomial expansion method (MJEM) which is based on the application of the truncated moments instead of the full ones. This allows to reconstruct with a high precision the local quark helicity distributions even for the narrow accessible for measurement Bjorken $x$ region using as an input only four first moments extracted from the data in NLO QCD. It is also proposed the variational (extrapolation) procedure allowing to reconstruct the distributions outside the accessible Bjorken $x$ region using the distributions obtained with MJEM in the accessible region. The numerical calculations encourage one that the proposed variational (extrapolation) procedure could be applied to estimate the full first (especially important) quark moments.
Discrete orthogonal polynomials and difference equations of several variables
Creators: name: Iliev, Plamen
name: Xu, Yuan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42C05, 33C45

description: The goal of this work is to characterize all second order difference operators of several variables that have discrete orthogonal polynomials as eigenfunctions. Under some mild assumptions, we give a complete solution of the problem.
description: minor typos corrected
The egalitarian effect of search engines
Creators: name: Fortunato, Santo
name: Flammini, Alessandro
name: Menczer, Filippo
name: Vespignani, Alessandro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Computers and Society (cs.CY)
subject: Information Retrieval (cs.IR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: H.3.3; H.3.4; H.3.5; H.5.4; K.4.m

description: Search engines have become key media for our scientific, economic, and social activities by enabling people to access information on the Web in spite of its size and complexity. On the down side, search engines bias the traffic of users according to their page-ranking strategies, and some have argued that they create a vicious cycle that amplifies the dominance of established and already popular sites. We show that, contrary to these prior claims and our own intuition, the use of search engines actually has an egalitarian effect. We reconcile theoretical arguments with empirical evidence showing that the combination of retrieval by search engines and search behavior by users mitigates the attraction of popular pages, directing more traffic toward less popular sites, even in comparison to what would be expected from users randomly surfing the Web.
description: 9 pages, 8 figures, 2 appendices. The final version of this e-print has been published on the Proc. Natl. Acad. Sci. USA 103(34), 12684-12689 (2006), http://www.pnas.org/cgi/content/abstract/103/34/12684
An Image Encryption Scheme Based on Chaotic Logarithmic Map and Key Generation using Deep CNN
Creators: name: Erkan, Uğur
name: Toktas, Abdurrahim
name: Enginoğlu, Serdar
name: Karabacak, Enver
name: Thanh, Dang N. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Cryptography and Security (cs.CR)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A secure and reliable image encryption scheme is presented in this study. The encryption scheme hereby introduces a novel chaotic log-map, deep convolution neural network (CNN) model for key generation, and bit reversion operation for the manipulation process. Thanks to the sensitive key generation, initial values and control parameters are produced for the hyperchaotic log-map, and thus a diverse chaotic sequence is achieved for encrypting operations. The scheme then encrypts the images by scrambling and manipulating the pixels of images through four operations: permutation, DNA encoding, diffusion, and bit reversion. The encryption scheme is precisely examined for the well-known images in terms of various analyses such as keyspace, key sensitivity, information entropy, histogram, correlation, differential attack, noisy attack, and cropping attack. To corroborate the scheme, the visual and numerical results are even compared with available outcomes of the state of the art. Therefore, the proposed log-map based image encryption scheme is successfully verified and validated by the superior absolute and comparative results.
D2.8 Transparency and Compliance Algorithms V2
Creators: name: Kirrane, Sabrina
name: Bonatti, Piero
name: Fernández, Javier D.
name: Galdi, Clemente
name: Sauro, Luigi
name: Dell'Erba, Daniele
name: Petrova, Iliana
name: Siahaan, Ida
Publisher: name: Zenodo
Year: 2018
Subjects: personal data processing, transparency, compliance

description: The aim of this deliverable is to dig deeper into open technical and research challenges in terms of personal data processing and sharing transparency, and compliance checking. Towards this end, we pay particular attention to: (i) compliance checking over SPECIAL’s policies in Chapter 1 ; (ii) how we can leverage existing distributed ledgers in order to cater for the desired data processing and sharing requirements in Chapter 2; (iii) how we can leverage the Big Data Europe engine for semantic data processing on large-scale RDF data in Chapter 3; and (iv) the guarantees in term of non-repudiation that could be provided by existing fair exchange protocols in Chapter 4. This deliverable builds upon technical requirements from D1.7: Policy, transparency and compliance guidelines V2, the SPECIAL policy language which is described in D2.1: Policy Language V1, and the SPECIAL transparency and compliance framework presented in Deliverable D2.7: Transparency Framework V2.
Rare and CP-Violating K and B Decays in the Littlest Higgs Model with T-Parity
Creators: name: Blanke, Monika
name: Buras, Andrzej J.
name: Poschenrieder, Anton
name: Recksiegel, Stefan
name: Tarantino, Cecilia
name: Uhlig, Selma
name: Weiler, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the most interesting rare and CP-violating K and B decays in the Littlest Higgs model with T-parity. We give a collection of Feynman rules including v^2/f^2 contributions that are presented here for the first time and could turn out to be useful also for applications outside flavour physics. We adopt a model-independent parameterization of rare decays in terms of the gauge independent functions X_i,Y_i,Z_i (i=K,d,s), which is in particular useful for the study of the breaking of the universality between K, B_d and B_s systems through non-MFV interactions. Performing the calculation in the unitary and 't Hooft-Feynman gauge, we find that the final result contains a divergence which signals some sensitivity to the ultraviolet completion of the theory. Including an estimate of this contribution, we calculate the branching ratios for the decays $K^+\toπ^+ν\barν$, $K_L\toπ^0ν\barν$, $B_{s,d}\to μ^+μ^-$, $B\to X_{s,d}ν\barν$, $K_L \toπ^0\ell^+\ell^-$ and $B\to X_{s,d}\ell^+\ell^-$, paying particular attention to non-MFV contributions present in the model. Imposing all available constraints we find that the decay rates for $B_{s,d} \to μ^+ μ^-$ and $B \to X_{s,d} ν\bar ν$ can be enhanced by at most 50% and 35% relative to the SM values, while $Br(K^+\toπ^+ν\barν)$ and $Br(K_L\toπ^0ν\barν)$ can be both as high as $5 \cdot 10^{-10}$. Significant enhancements of the decay rates $K_L \toπ^0\ell^+\ell^-$ are also possible. Simultaneously, the CP-asymmetries $S_{ψϕ}$ and $A^s_\text{SL}$ can be enhanced by an order of magnitude, while the electroweak penguin effects in $B \to πK$ turn out to be small, in agreement with the recent data.
description: 65 pages, 19 figures. Note added on omitted term in Z-penguin contribution. For an updated analysis see arXiv:0906.5454
Fürchte dich nicht - erinnere die Zukunft
Creators: name: Wartenberg-Potter, Bärbel Von
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 43 Nr. 4 (1994): Ökumenische Rundschau, Band 43, Heft 4
Six New Species of  Agaricus (Agaricaceae, Agaricales) from Northeast China
Creators: name: Wang, Shi-en
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310705
subject: Mycology

description: Many Agaricus specimens have been collected during macrofungal resource field investigations in Northeast China. Based on morphological observations and multi-gene phylogenetic analyses, six new Agaricus species were discovered.
The design and implementation of Language Learning Chatbot with XAI using Ontology and Transfer Learning
Creators: name: Shi, Nuobei
name: Zeng, Qin
name: Lee, Raymond
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we proposed a transfer learning-based English language learning chatbot, whose output generated by GPT-2 can be explained by corresponding ontology graph rooted by fine-tuning dataset. We design three levels for systematically English learning, including phonetics level for speech recognition and pronunciation correction, semantic level for specific domain conversation, and the simulation of free-style conversation in English - the highest level of language chatbot communication as free-style conversation agent. For academic contribution, we implement the ontology graph to explain the performance of free-style conversation, following the concept of XAI (Explainable Artificial Intelligence) to visualize the connections of neural network in bionics, and explain the output sentence from language model. From implementation perspective, our Language Learning agent integrated the mini-program in WeChat as front-end, and fine-tuned GPT-2 model of transfer learning as back-end to interpret the responses by ontology graph.
description: 19 pages, 20 figures, published paper in International Conference on NLP & Big Data (NLPD 2020)
A Perturbative Approach to Fuzzifying Field Theories
Creators: name: Pinzul, A.
name: Stern, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a procedure for computing noncommutative corrections to the metric tensor, and apply it to scalar field theory written on coordinate patches of smooth manifolds. The procedure involves finding maps to the noncommutative plane where differentiation and integration are easily defined, and introducing a star product. There are star product independent, as well as dependent, corrections. Applying the procedure for two different star products, we find the lowest order fuzzy corrections to scalar field theory on a sphere which is sterographically projected to the plane.
description: 24 pages
Diabatic description of charmoniumlike mesons II: mass corrections and strong decay widths
Creators: name: Bruschini, R.
name: González, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: From a diabatic bound state approach to $J^{PC}=1^{--}$ and $(0,1,2)^{++}$ charmoniumlike resonances below $4.1$ GeV, formulated in terms of ${c\overline{c}}$ and closed meson-meson channels, we calculate mass shifts and widths due to open meson-meson channels. This calculation does not involve any new free parameter, so comparison of our predictions with existing data provides a direct test of our approach. Further mass corrections are also estimated and good agreement with the measured masses comes out. As for the calculated widths, overall reasonable, they point out to the need of some refinement of our current bound state approximation for an accurate description of data. These results give additional support to the diabatic approach in QCD as an adequate framework for a complete unified description of conventional and unconventional charmoniumlike resonances. In this respect, the experimental discovery of a predicted $2^{++}$ resonance with a mass around $4$ GeV would be of special relevance.
description: 9 pages, 5 tables; v2: new appendix, extended Introduction and Results, additional references, other small additions and corrections
Cross-talk compensation of hyperfine control in donor qubit architectures
Creators: name: Kandasamy, G
name: Wellard, C J
name: Hollenberg, L C L
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically investigate cross-talk in hyperfine gate control of donor-qubit quantum computer architectures, in particular the Kane proposal. By numerically solving the Poisson and Schrödinger equations for the gated donor system, we calculate the change in hyperfine coupling and thus the error in spin-rotation for the donor nuclear-electron spin system, as the gate-donor distance is varied. We thus determine the effect of cross-talk - the inadvertent effect on non-target neighbouring qubits - which occurs due to closeness of the control gates (20-30nm). The use of compensation protocols is investigated, whereby the extent of crosstalk is limited by the application of compensation bias to a series of gates. In light of these factors the architectural implications are then considered.
description: 15 pages, 22 figures, submitted to Nanotechnology
Paths with many shortcuts in tournaments
Creators: name: Yuster, Raphael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C20, 05C35, 05C38

description: A shortcut of a directed path $v_1 v_2 \cdots v_n$ is an edge $v_iv_j$ with $j > i+1$. If $j = i+2$ the shortcut is called a hop. If all hops are present, the path is called hop complete, so the path and its hops form a square of a path. We prove that every tournament with $n \ge 4$ vertices has a Hamiltonian path with at least $(4n-10)/7$ hops, and has a hop complete path of order at least $n^{0.295}$. A spanning binary tree of a tournament is a spanning shortcut tree if for every vertex of the tree, all its left descendants are in-neighbors and all its right descendants are out-neighbors. It is well-known that every tournament contains a spanning shortcut tree. The number of shortcuts of a shortcut tree is the number of shortcuts of its unique induced Hamiltonian path. Let $t(n)$ denote the largest integer such that every tournament with $n$ vertices has a spanning shortcut tree with at least $t(n)$ shortcuts. We almost determine the asymptotic growth of $t(n)$ as it is proved that $Θ(n\log^2n) \ge t(n)-\frac{1}{2}\binom{n}{2} \ge Θ(n \log n)$.
Teaching Business Models via Blended-Learning
Creators: name: Bohnsack, René
name: Margolina, Alina
Publisher: name: Journal of Business Models
Year: 2019

description: The paper at hand describes the application of an online venture creation platform, the Smart Business Modeler, for teaching business model development. The tool has been applied as a part of an experiment with a blended learning approach in an educational setting. The paper presents the results of the experiment.
description: Journal of Business Models, Vol 7 No 3 (2019): Special Issue: Teaching Business Models - Part 1
Black Hole and Galaxy Coevolution in Moderately Luminous Active Galactic Nuclei at z~1.4 in SXDF
Creators: name: Setoguchi, Kenta
name: Ueda, Yoshihiro
name: Toba, Yoshiki
name: Akiyama, Masayuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the relation of black hole mass versus host stellar mass and that of mass accretion rate versus star formation rate (SFR) in moderately luminous ($\log L_{\rm bol} \sim 44.5-46.5\ {\rm erg\ s^{-1}}$), X-ray selected broad-line active galactic nuclei (AGNs) at $z=1.18-1.68$ in the Subaru/XMM-Newton Deep Field. The far-infrared to far-ultraviolet spectral energy distributions of 85 AGNs are reproduced with the latest version of Code Investigating GALaxy Emission ({\tt CIGALE}), where the AGN clumpy torus model {\tt SKIRTOR} is implemented. Most of their hosts are confirmed to be main-sequence star-forming galaxies. We find that the mean ratio of the black hole mass ($M_{\rm BH}$) to the total stellar mass ($M_{\rm stellar}$) is $\log M_{\rm BH}/M_{\rm stellar} = -2.2$, which is similar to the local black hole-to-bulge mass ratio. This suggests that if the host galaxies of these moderately luminous AGNs at $z\sim1.4$ are dominated by bulges, they already established the local black hole mass-bulge mass relation; if they are disk dominant, their black holes are overmassive relative to the bulges. AGN bolometric luminosities and SFR show a good correlation with ratios higher than that expected from the local black hole-to-bulge mass relation, suggesting that these AGNs are in a SMBH-growth dominant phase.
description: 9 pages, 5 figures, 1 table, accepted for publication in ApJ; the error in the figure corrected, sentences changed a little
D'une chronique de la « tache originelle » au « roman des origines »
Creators: name: Sabatier, Claude
Publisher: name: Classiques Garnier
Year: 2015

description: L'étrange coïncidence entre la chute de Napoléon III et les premiers feuilletons de La Fortune des Rougon, au cours de l'été 1870, confère au récit des « origines » la portée documentaire et politique que lui assignait déjà, le 29 août 1869, un article de La Tribune. Rarement roman aura été autant programmé par une chronique, dans la structuration de ses motifs obsédants : les thèmes du coup d'État, de l'appel à l'Histoire et de la tache originelle parcourent l'article pour s'inscrire dans l'œuvre finale.
description: The strange coincidence of the fall of Napoléon III and the first serials of La Fortune des Rougon, during the summer of 1870, conferred a documentary and political dimension on the novel of “origins” which in fact had already been assigned to it by an article of 29 August 1869 in La Tribune. Rarely had a novel and its obsessive motifs been programmed to such an extent in a column. The themes of the coup d'État, the call of history, and original sin ran throughout the article and inscribed themselves within the final œuvre.
Gespräch über die Kunst der Fuge von Johann Sebastian Bach
Creators: name: Peter Oberosler
Publisher: name: Zenodo
Year: 2024

description: Peter Oberosler / Claudius Tanski, Gespräch über die Kunst der Fuge von Johann Sebastian Bach 16.09.2021;

The Art of Fugue, The Art of the Fugue BWV 1080;
Adiabatic waves along interfacial layers near the critical point
Creators: name: Gouin, Henri
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Other Condensed Matter (cond-mat.other)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Near the critical point, isothermal interfacial zones are investigated starting from a non-local density of energy. From the equations of motion of thermocapillary fluids, we point out a new kind of adiabatic waves propagating along the interfacial layers. The waves are associated with the second derivatives of densities and propagate with a celerity depending on the proximity of the critical point.
description: 12 pages
Canadian values and the regionalization of Alberta’s health care system: an ethical analysis
Creators: name: Jiwani, Bashir
Publisher: name: University of British Columbia
Year: 2009

description: In Alberta, decision-making in the health system has been devolved to seventeen Regional Health Authorities (RHAs). This thesis undertakes a broad analysis of the values that underlie this regionalization. Divided into two parts, the first half of the thesis develops a liberal egalitarian theory for the distribution of resources in society that turns on the importance of providing all people with the basic resources required to plan for, develop and achieve their life goals. Four requirements for any health system that seeks to uphold the values inherent in this theory are then articulated. These requirements include the need for the health system to be sensitive to the broader determinants of health, and the need for understanding the concepts of health and disease within the context of the social and cultural communities that the system is meant to serve. Part One concludes with an argument suggesting that expressions of Canadian values cohere with the normative theory developed. In Part Two the evolution of Alberta's regionalized healthcare system is traced. The values implicit in the regionalization of the health system in this province are then examined for their congruence with the four requirements developed in Part One. Following this, the ethical difficulties faced by RHAs are considered. The thesis culminates with thoughts on the ethical challenges Alberta's regionalized healthcare system must confront, offering recommendations for how some of these challenges may be addressed. It is concluded in the thesis that while a regionalized health system is not necessary for meeting the requirements elucidated, these standards can be met with a regionalized approach. However, at least in the case of the Alberta experience, a number of important changes would have to take place for this to occur. Among these changes is a paradigm shift in the way health and disease are understood towards a more evaluative approach; the recentralization of public health initiatives to the provincial level; and an overall change in governmental health policy recognizing that many areas of society, and consequently the policies of government agencies beyond a disease-based healthcare system, impact health and well-being.
British Gallup Poll CQ 906
Creators: name: Social Surveys (Gallup Poll) Limited
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Topics discussed with family (1); General Election voting (4); Conservative Party (4); Labour Party (4); Common Market (3); confidence in United States (2); opinion of US President Richard Nixon (1); Middle East dispute (6); India's underground nuclear explosion (1); India as nuclear power (1); Vitamin C (9); petrol, motor oil (3); watching television (6); carpet shampoo (2); tea (3); trade union card (1).
Giant isotope effect in the incoherent tunneling specific heat of the molecular nanomagnet Fe8
Creators: name: Evangelisti, M.
name: Luis, F.
name: Mettes, F. L.
name: Sessoli, R.
name: de Jongh, L. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Time-dependent specific heat experiments on the molecular nanomagnet Fe8 and the isotopic enriched analogue 57Fe8 are presented. The inclusion of the 57Fe nuclear spins leads to a huge enhancement of the specific heat below 1 K, ascribed to a strong increase in the spin-lattice relaxation rate Gamma arising from incoherent, nuclear-spin-mediated magnetic quantum tunneling in the ground-doublet. Since Gamma is found comparable to the expected tunneling rate, the latter process has to be inelastic. A model for the coupling of the tunneling levels to the lattice is presented. Under transverse field, a crossover from nuclear-spin-mediated to phonon-induced tunneling is observed.
description: Replaced with version accepted for publication in Physical Review Letters
D2.6 Formal representation of the legislation V2
Creators: name: Bonatti, P.A.
name: Kirrane, S.
name: Petrova, I.
name: Sauro, L.
name: Kerschbaum, C.
name: Pirkova, E.
Publisher: name: Zenodo
Year: 2018
Subjects: policy language, GDPR

description: Chapter 1 summarises the results of our structural analysis of the text of the GDPR. The primary goal being to derive a set of must-have structural requirements, that are necessary in order to represent the GDPR in a machine readable format. Chapter 2 in turn details our progress on the the formal representation of the GDPR, which will be iteratively refined throughout the course of the project and completed with the release of the final versions of the pilots’ business policies and GDPR’s formalization (as part of the implementation packages WP3 and WP5).
Interplay of Density and Phase Fluctuations in Ultracold One-dimensional Bose Gases
Creators: name: Proukakis, N. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The relative importance of density and phase fluctuations in ultracold one dimensional atomic Bose gases is investigated. By defining appropriate characteristic temperatures for their respective onset, a broad experimental regime is found, where density fluctuations set in at a lower temperature than phase fluctuations. This is in stark contrast to the usual experimental regime explored up to now, in which phase fluctuations are largely decoupled from density fluctuations, a regime also recovered in this work as a limiting case. Observation of the novel regime of dominant density fluctuations is shown to be well within current experimental capabilities for both $^{23}Na$ and $^{87}Rb$, requiring relatively low temperatures, small atom numbers and moderate aspect ratios.
description: Expanded experimental discussion, modified Fig. 3
Adsorption-controlled growth of MnTe(Bi2Te3)n by molecular beam epitaxy exhibiting stoichiometry-controlled magnetism
Creators: name: Lapano, Jason
name: Nuckols, Lauren
name: Mazza, Alessandro R.
name: Pai, Yun-Yi
name: Zhang, Jie
name: Lawrie, Ben
name: Moore, Rob G.
name: Eres, Gyula
name: Lee, Ho Nyung
name: Du, Mao-Hua
name: Ward, T. Zac
name: Lee, Joon Sue
name: Weber, William J.
name: Zhang, Yanwen
name: Brahlek, Matthew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report the growth of the intrinsic magnetic topological system MnTe(Bi2Te3)n by molecular beam epitaxy. By mapping the temperature and the Bi:Mn flux ratio, it is shown that there is a narrow growth window for the n=1 phase MnBi2Te4 with 2.04.5) it is found that the n = 2 MnBi4Te7 phase is stabilized. Transport measurements indicate that the MnBi2Te4 and MnBi4Te7 undergo magnetic transitions around 25 K, and 10 K, respectively, consistent with antiferromagnetic phases found in the bulk. Further, for Mn-rich conditions (Bi:Mn<2), ferromagnetism emerges that exhibits a clear hysteretic state in the Hall effect, which likely indicates Mn-doped MnBi2Te4. Understanding how to grow ternary chalcogenide phases is the key to synthesizing new materials and to interface magnetism and topology, which together are routes to realize and control exotic quantum phenomena.
description: Accepted in Physical Review Materials
A New Construction of Quasi-solvable Quantum Many-body Systems of Deformed Calogero-Sutherland Type
Creators: name: Tanaka, Toshiaki
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We make a new multivariate generalization of the type A monomial space of a single variable. It is different from the previously introduced type A space of several variables which is an sl(M+1) module, and we thus call it type A'. We construct the most general quasi-solvable operator of (at most) second-order which preserves the type A' space. Investigating directly the condition under which the type A' operators can be transformed to Schroedinger operators, we obtain the complete list of the type A' quasi-solvable quantum many-body systems. In particular, we find new quasi-solvable models of deformed Calogero-Sutherland type which are different from the Inozemtsev systems. We also examine a new multivariate generalization of the type C monomial space based on the type A' scheme.
description: 31 pages, no figures; minor revision, to appear in Annals of Physics
Advances in Electron Microscopy with Deep Learning
Creators: name: Ede, Jeffrey M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This doctoral thesis covers some of my advances in electron microscopy with deep learning. Highlights include a comprehensive review of deep learning in electron microscopy; large new electron microscopy datasets for machine learning, dataset search engines based on variational autoencoders, and automatic data clustering by t-distributed stochastic neighbour embedding; adaptive learning rate clipping to stabilize learning; generative adversarial networks for compressed sensing with spiral, uniformly spaced and other fixed sparse scan paths; recurrent neural networks trained to piecewise adapt sparse scan paths to specimens by reinforcement learning; improving signal-to-noise; and conditional generative adversarial networks for exit wavefunction reconstruction from single transmission electron micrographs. This thesis adds to my publications by presenting their relationships, reflections, and holistic conclusions. This version of my thesis is typeset for online dissemination to improve readability, whereas the thesis submitted to the University of Warwick in support of my application for the degree of Doctor of Philosophy in Physics is typeset for physical printing and binding.
description: 295 pages, phd thesis, 100 figures + 12 tables, papers are compressed
Symmetries, Microcausality and Physics on Canonical Noncommutative Spacetime
Creators: name: Calmet, Xavier
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we describe how to implement symmetries on a canonical noncommutative spacetime. We focus on noncommutative Lorentz transformations. We then discuss the structure of the light cone on a canonical noncommutative spacetime and show that field theories formulated on these spaces do not violate mircocausality.
description: 6 pages, to appear in the proceedings of 40th Rencontres de Moriond, Electroweak Interactions and Unified Theories, March 11 - 18, 2006; v2: minor typos corrected, one reference added
D2.5 Policy Language V2
Creators: name: Bonatti, P.A.
name: Kirrane, S.
name: Petrova, I.
name: Sauro, L.
name: Schlehahn, E.
Publisher: name: Zenodo
Year: 2018
Subjects: policy language

description: This is the second version of the deliverable devoted to defining SPECIAL’s policy language and related vocabularies. It refines the first version by taking into account the work on the pilots and their specific policies, plus the discussion that is taking place within the DPVCG community group of W3C.The additional needs emerging from the above activities require only one structural change to SPECIAL’s language, namely, allowing object properties to be used in the vocabularies (while so far they were only applied to policies, to specify their attributes “data category”, “purpose”,“processing”, and so on). In particular, the usage policy language grammar reported in Figure 1.1 has not been changed.1The other changes concern the need for pilot-specific terms, for more general categorizations associated to GDPR’s requirements (such as distinguishing sensitive data and criminal records,for example), and for additional concepts stemming from the GDPR, such as the legal basis for processing.The novel features are discussed in Section 9. The rest of the deliverable corresponds to the first version, with the exception of a few minor corrections.
Memory effect in Yang-Mills theory with an axion
Creators: name: Jokela, Niko
name: Kajantie, K.
name: Sarkkinen, Miika
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the empirical realization of the memory effect in Yang-Mills theory with an axion-like particle, especially in view of the classical vs. quantum nature of the theory. We solve for the coupled equations of motion iteratively in the axionic contributions and explicitly display the gauge invariant effects in terms of field strengths. We apply our results in the context of heavy ion collisions, in the thin nuclear sheet limit, and point out that a probe particle traversing radiation train acquires a longitudinal null memory kick in addition to the usual transverse kick.
description: 24 pages, 3 figures
The structure of the nucleon
Creators: name: Bijker, Roelof
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Experimental data on electromagnetic and weak form factors of the nucleon are analyzed in a two-component model with a quark-like intrinsic structure surrounded by a meson cloud. The contribution from strange quarks is discussed and compared with recent data from the G0 Collaboration.
description: 6 pages, 3 figures, invited talk VI Latin American Symposium on Nuclear Physics and Applications, to be published by Acta Phys. Hung. A
MS40 SSHOC Training Toolkit (preliminary version)
Creators: name: Braukmann, Ricarda
name: Leenarts, Ellen
Publisher: name: Zenodo
Year: 2020

description: This milestone report describes the first release of the SSHOC Training Toolkit which was launched on April 20th, 2020. The Toolkit is meant for SSH trainers to find and retrieve materials that can be used in training activities. ask 6.4 of SSHOC Work Package 6 concerns the building of expertise within the Social Sciences and Humanities (SSH) training community. One of the key outcomes of this task and the milestone described in this report is the SSHOC Training Toolkit. The Toolkit is meant to serve as a framework for training design, organisation and delivery. It is developed to aid trainers in the SSH by providing them with materials that they can utilize in their own training activities. The Toolkit is a key resource for the SSHOC Training Community (described in more detail in SSHOC Deliverable 6.10 Report on the SSHOC Training Community) and will be promoted and used during the SSHOC Train-the-Trainer Bootcamps (described in more detail in SSHOC Deliverable 6.10 Report on the SSHOC Training Community and D6.9 - SSHOC Trainer Toolkit (draft)). The first version of the Training Toolkit was developed by extending the work from WP6 Task 6.3 which collected information on existing learning materials in the field of SSH. As described in D6.7 Inventory of Existing Learning Materials, a drupal-based application was used to collect and curate information on different learning materials. The same application was used and further extended to become the published first version of the SSHOC Training Toolkit that scholars can now freely access. The Toolkit is a searchable inventory that by the time of launch contained more than 70 items from 41 different sources covering a range of topics including Research Data Management, Open Science and didactics. The Toolkit and its content are described in more detail in SSHOC Deliverable D6.9 - SSHOC Trainer Toolkit (draft). Throughout the remainder of the SSHOC Project, the Toolkit will be further developed in collaboration with the SSHOC Training Community and presented and evaluated during the SSHOC Train-the-Trainer Bootcamps. A final version of the Toolkit is another milestone of the project later in the project (Milestone 41 SSHOC Training Toolkit (updated version)) and the final version will be described in SSHOC Deliverable 6.11 SSHOC Training Toolkit (final).
code for Optimization Model for Urban Ecological Network Connectivity Considering Geospatial Constraints
Creators: name: hong, wuyang
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 401302
subject: Geospatial information systems and geospatial data modelling

description: With the goal of enhancing the connectivity of the ecological network , the closeness indices that characterize the network connectivity were selected. The objective function curve of the optimized network was generated for each time step to compare optimization scheme performance.
The accuracy of signal measurement with the water-Cherenkov detectors of the Pierre Auger Observatory
Creators: name: Ave, M.
name: Bauleo, P.
name: Castellina, A.
name: Chou, A.
name: Harton, J. L.
name: Knapil, R.
name: Navarra, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Auger Surface Detector consists of a large array of water Cherenkov detector tanks each with a volume of 12,000 liters, for the detection of high energy cosmic rays. The accuracy in the measurement of the integrated signal amplitude of the detector unit has been studied using experimental air shower data. It can be described as a Poisson-like term with a normalization constant that depends on the zenith angle of the primary cosmic ray. This dependence reflects the increasing contribution to the signal of the muonic component of the shower, both due to the increasing muon/electromagnetic (e+- and gamma) ratio and muon track length with zenith angle.
description: 5 pages, 3 figures
Screening in semiconductor nanocrystals: \textit{Ab initio} results and Thomas-Fermi theory
Creators: name: Trani, F.
name: Ninno, D.
name: Cantele, G.
name: Iadonisi, G.
name: Hameeuw, K.
name: Degoli, E.
name: Ossicini, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A first-principles calculation of the impurity screening in Si and Ge nanocrystals is presented. We show that isocoric screening gives results in agreement with both the linear response and the point-charge approximations. Based on the present ab initio results, and by comparison with previous calculations, we propose a physical real-space interpretation of the several contributions to the screening. Combining the Thomas-Fermi theory and simple electrostatics, we show that it is possible to construct a model screening function that has the merit of being of simple physical interpretation. The main point upon which the model is based is that, up to distances of the order of a bond length from the perturbation, the charge response does not depend on the nanocrystal size. We show in a very clear way that the link between the screening at the nanoscale and in the bulk is given by the surface polarization. A detailed discussion is devoted to the importance of local field effects in the screening. Our first-principles calculations and the Thomas-Fermi theory clearly show that in Si and Ge nanocrystals, local field effects are dominated by surface polarization, which causes a reduction of the screening in going from the bulk down to the nanoscale. Finally, the model screening function is compared with recent state-of-the-art ab initio calculations and tested with impurity activation energies.
title: Une femme à sa fenêtre
title: Félicité ou l'axiologie des regards
titleType: Subtitle
Creators: name: Piton-Foucault, Emilie
Publisher: name: Classiques Garnier
Year: 2015

description: La fenêtre comme dispositif permettant de développer des descriptions réalistes de la nature n'est étonnamment pas exploitée dans ce roman. La bande à Rougon ne perçoit ainsi le paysage nocturne que d'une manière fantasmagorique, à une terrasse. Silvère et Miette regardent, eux, la nature au travers d'une fenêtre imaginaire. Ce refus du réalisme trouve dans Félicité son expression la plus flagrante. Avec elle, la fenêtre devient même inquiétante, présage, puis acteur de la mort de Peirotte.
description: Surprisingly, the window as a device enabling the development of realistic descriptions of nature is not exploited in this novel. The Rougons only perceive the nocturnal landscape in a phantasmagorical way, on a terrace. Silvère and Miette look at nature through an imaginary window. This refusal of realism finds its most flagrant expression in Félicité. With her, the window even becomes worrying and ominous, and then an agent in the death of Peirotte.
MPEC 2024-T213 : DAILY ORBIT UPDATE (2024 October 9)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Understanding the behavior of Prometheus and Pandora
Creators: name: Farmer, Alison J.
name: Goldreich, Peter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We revisit the dynamics of Prometheus and Pandora, two small moons flanking Saturn's F ring. Departures of their orbits from freely precessing ellipses result from mutual interactions via their 121:118 mean motion resonance. Motions are chaotic because the resonance is split into four overlapping components. Orbital longitudes were observed to drift away from Voyager predictions, and a sudden jump in mean motions took place close to the time at which the orbits' apses were antialigned in 2000. Numerical integrations reproduce both the longitude drifts and the jumps. The latter have been attributed to the greater strength of interactions near apse antialignment (every 6.2 years), and it has been assumed that this drift-jump behavior will continue indefinitely. We re-examine the dynamics by analogy with that of a nearly adiabatic, parametric pendulum. In terms of this analogy, the current value of the action of the satellite system is close to its maximum in the chaotic zone. Consequently, at present, the two separatrix crossings per precessional cycle occur close to apse antialignment. In this state libration only occurs when the potential's amplitude is nearly maximal, and the 'jumps' in mean motion arise during the short intervals of libration that separate long stretches of circulation. Because chaotic systems explore the entire region of phase space available to them, we expect that at other times the system would be found in states of medium or low action. In a low action state it would spend most of the time in libration, and separatrix crossings would occur near apse alignment. We predict that transitions between these different states can happen in as little as a decade. Therefore, it is incorrect to assume that sudden changes in the orbits only happen near apse antialignment.
description: 22 pages, 13 figs, Icarus accepted