cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Como los comentarios de usuarios en medios electrónicos afectan al proceso de compra de productos hoteleros: un estudio empírico en España y Portugal
Creators: name: Hernández Mogollón, José Manuel
name: Herrero Crespo, Angel
name: Martín Gutiérrez, Héctor San
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2014

description: En los últimos años la introducción de las tecnologías de la información y la comunicación (TIC) en el marketing de productos turísticos ha supuesto el mayor cambio para el marketing hotelero. En concreto, el uso de estas herramientas por parte de los consumidores está teniendo un fuerte impacto en cómo se toman las decisiones en el proceso de elección de los destinos turísticos y los hoteles. Esta investigación profundiza en el conocimiento del uso de los medios electrónicos por los turistas, como una de las herramientas que en la actualidad más pueden influir en el comportamiento del consumidor. Se entrevistó a una muestra 1.024 turistas, 648 en España y 376 en Portugal, con la finalidad de analizar cuestiones como la influencia percibida, valor de la información, credibilidad o afinidad con estos medios electrónicos, en los procesos de compra de productos hoteleros. Se compararon los resultados entre las muestras de ambos países para comprobar cómo las diferencias culturales pueden modificar la importancia de estas variables en el uso de medios electrónicos para la compra de productos hoteleros.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 21/22 (2014)
The Carnegie Supernova Project: First Near-Infrared Hubble Diagram to z~0.7
Creators: name: Freedman, Wendy L.
name: Burns, Christopher R.
name: Phillips, M. M.
name: Wyatt, Pamela
name: Persson, S. E.
name: Madore, Barry F.
name: Contreras, Carlos
name: Folatelli, Gaston
name: Gonzalez, E. Sergio
name: Hamuy, Mario
name: Hsiao, Eric
name: Kelson, Daniel D.
name: Morrell, Nidia
name: Murphy, D. C.
name: Roth, Miguel
name: Stritzinger, Maximilian
name: Sturch, Laura
name: Suntzeff, Nick B.
name: Astier, P.
name: Balland, C.
name: Bassett, Bruce
name: Boldt, Luis
name: Carlberg, R. G.
name: Conley, Alexander J.
name: Frieman, Joshua A.
name: Garnavich, Peter M.
name: Guy, J.
name: Hardin, D.
name: Howell, D. Andrew
name: Kessler, Richard
name: Lampeitl, Hubert
name: Marriner, John
name: Pain, R.
name: Perrett, Kathy
name: Regnault, N.
name: Riess, Adam G.
name: Sako, Masao
name: Schneider, Donald P.
name: Sullivan, Mark
name: Wood-Vasey, Michael
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Carnegie Supernova Project (CSP) is designed to measure the luminosity distance for Type Ia supernovae (SNe Ia) as a function of redshift, and to set observational constraints on the dark energy contribution to the total energy content of the Universe. The CSP differs from other projects to date in its goal of providing an I-band {rest-frame} Hubble diagram. Here we present the first results from near-infrared (NIR) observations obtained using the Magellan Baade telescope for SNe Ia with 0.1 < z < 0.7. We combine these results with those from the low-redshift CSP at z <0.1 (Folatelli et al. 2009). We present light curves and an I-band Hubble diagram for this first sample of 35 SNe Ia and we compare these data to 21 new SNe Ia at low redshift. These data support the conclusion that the expansion of the Universe is accelerating. When combined with independent results from baryon acoustic oscillations (Eisenstein et al. 2005), these data yield Omega_m = 0.27 +/- 0.0 (statistical), and Omega_DE = 0.76 +/- 0.13 (statistical) +/- 0.09 (systematic), for the matter and dark energy densities, respectively. If we parameterize the data in terms of an equation of state, w, assume a flat geometry, and combine with baryon acoustic oscillations, we find that w = -1.05 +/- 0.13 (statistical) +/- 0.09 (systematic). The largest source of systematic uncertainty on w arises from uncertainties in the photometric calibration, signaling the importance of securing more accurate photometric calibrations for future supernova cosmology programs. Finally, we conclude that either the dust affecting the luminosities of SNe Ia has a different extinction law (R_V = 1.8) than that in the Milky Way (where R_V = 3.1), or that there is an additional intrinsic color term with luminosity for SNe Ia independent of the decline rate.
description: 44 pages, 23 figures, 9 tables; Accepted for publication in the Astrophysical Journal
Flux dynamics and vortex phase diagram in $Ba(Fe_{1-x}Co_x)_2As_2$ single crystals revealed by magnetization and its relaxation
Creators: name: Shen, Bing
name: Cheng, Peng
name: Wang, Zhaosheng
name: Fang, Lei
name: Ren, Cong
name: Shan, Lei
name: Wen, Hai-Hu
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetization and its relaxation have been measured in $Ba(Fe_{1-x}Co_x)_2As_2$ single crystals at various doping levels ranging fromvery underdoped to very overdoped regimes. Sizable magnetization relaxation rate has been observed in all samples, indicating a moderate vortex motion and relatively small characteristic pinning energy. Detailed analysis leads to the following conclusions: (1) A prominent second-peak (SP) effect was observed in the samples around the optimal doping level (x $\approx$ 0.08), but it becomes invisible or very weak in the very underdoped and overdoped samples; (2) The magnetization relaxation rate is inversely related to the transient superconducting current density revealing the non-monotonic field and temperature dependence through the SP region; (3) A very sharp magnetization peak was observed near zero field which corresponds to a much reduced relaxation rate; (4) A weak temperature dependence of relaxation rate or a plateau was found in the intermediate temperature region. Together with the treatment of the Generalized-Inversion-Scheme, we suggest that the vortex dynamics is describable by the collective pinning model. Finally, vortex phase diagrams were drawn for all the samples showing a systematic evolution of vortex dynamics.
description: 13 pages, 21 figures
Neural networks trained with SGD learn distributions of increasing complexity
Creators: name: Refinetti, Maria
name: Ingrosso, Alessandro
name: Goldt, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (stat.ML)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The ability of deep neural networks to generalise well even when they interpolate their training data has been explained using various "simplicity biases". These theories postulate that neural networks avoid overfitting by first learning simple functions, say a linear classifier, before learning more complex, non-linear functions. Meanwhile, data structure is also recognised as a key ingredient for good generalisation, yet its role in simplicity biases is not yet understood. Here, we show that neural networks trained using stochastic gradient descent initially classify their inputs using lower-order input statistics, like mean and covariance, and exploit higher-order statistics only later during training. We first demonstrate this distributional simplicity bias (DSB) in a solvable model of a neural network trained on synthetic data. We empirically demonstrate DSB in a range of deep convolutional networks and visual transformers trained on CIFAR10, and show that it even holds in networks pre-trained on ImageNet. We discuss the relation of DSB to other simplicity biases and consider its implications for the principle of Gaussian universality in learning.
description: Source code available at https://github.com/sgoldt/dist_inc_comp
New formulation of Galilean relativistic Maxwell theory
Creators: name: Banerjee, Rabin
name: Bhattacharya, Soumya
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we discuss Galilean relativistic Maxwell theory in detail. We first provide a set of mapping relations, derived systematically, that connect the covariant and contravariant vectors in the Lorentz relativistic and Galilean relativistic formulations. Exploiting this map, we construct the two limits of Galilean relativistic Maxwell theory from usual Maxwell's theory in the potential formalism for both contravariant and covariant vectors which are now distinct entities. Field equations are derived and their internal consistency is shown. The entire analysis is then performed in terms of electric and magnetic fields for both covariant and contravariant components. Duality transformations and their connection with boost symmetry are discussed which reveal a rich structure. The notion of twisted duality is introduced. Next we consider gauge symmetry, construct Noether currents and show their on-shell conservation. We also discuss shift symmetry under which the Lagrangian is invariant, where the corresponding currents are now on-shell conserved. At the end we analyse the theory by including sources for both contravariant and covariant sectors. We show that sources are now off-shell conserved
description: 19 pages, 7 tables, Minor changes, Accepted for publication in Phys. Rev. D
title: Wind Value Summer Seminar 2023 Kevin Campbell on Compliance Bonds Slides
title: Industry Meets Academia Summer Seminar
titleType: AlternativeTitle
Creators: name: Campbell, Kevin
name: Deeney, Peter
Publisher: name: Zenodo
Year: 2023

description: Slides presented by Kevin Campbell at the Wind Value Summer Seminar on 31st August 2023 in the Environmental Research Institute, University College Cork, Ireland. He talks about the use of Compliance Bonds to encourage a circular economy.
‘Turistificando’ a capital do RN com o Viva & Conheça Natal
Creators: name: Signoretti, Alberto
name: Paradeda, Raul
name: Câmara, Michelle G.
name: Signoretti, Gabriel L .A. M.
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2014

description: Viva & Conheça Natal é uma proposta de uma plataforma digital ‘gameficada’ para dispositivos móveis interligado com um servidor web. Nessa plataforma, tanto os turistas como os moradores locais, em especial os estudantes do ensino médio, podem adquirir informações e conhecimento sobre a história, cultura e turismo da Capital Potiguar, Natal. O uso de um processo ‘gameficado’ permite que esse aprendizado possa ser conduzido de forma lúdica. Para o turista, além de fonte de informação, a plataforma pode ser um auxiliar digital no processo de descobrimento das maravilhas oferecidas pela cidade. Além disso, a plataforma pode ser associada a diversos aparelhos turísticos como hotéis, bares, restaurantes e outros serviços (passeios de buggy, visitas, etc.) para que, aos vencedores de determinadas etapas, sejam oferecidas promoções. Essa plataforma digital utilizará diversas Tecnologias de Informação e Comunicação (TIC) das mais inovadoras presentes na atualidade como: realidade aumentada (som, imagem e texto), QR codes, GPS (mapas geo-referenciados e check-in), Mapeamento Panorâmico Local (MPL), entre outras.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 21/22 (2014)
Long term behavior of dynamic equilibria in fluid queuing networks
Creators: name: Cominetti, Roberto
name: Correa, José
name: Olver, Neil
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 05C21, 91A25

description: A fluid queuing network constitutes one of the simplest models in which to study flow dynamics over a network. In this model we have a single source-sink pair and each link has a per-time-unit capacity and a transit time. A dynamic equilibrium (or equilibrium flow over time) is a flow pattern over time such that no flow particle has incentives to unilaterally change its path. Although the model has been around for almost fifty years, only recently results regarding existence and characterization of equilibria have been obtained. In particular the long term behavior remains poorly understood. Our main result in this paper is to show that, under a natural (and obviously necessary) condition on the queuing capacity, a dynamic equilibrium reaches a steady state (after which queue lengths remain constant) in finite time. Previously, it was not even known that queue lengths would remain bounded. The proof is based on the analysis of a rather non-obvious potential function that turns out to be monotone along the evolution of the equilibrium. Furthermore, we show that the steady state is characterized as an optimal solution of a certain linear program. When this program has a unique solution, which occurs generically, the long term behavior is completely predictable. On the contrary, if the linear program has multiple solutions the steady state is more difficult to identify as it depends on the whole temporal evolution of the equilibrium.
description: 23 pages, 6 figures
Itinerant Ferromagnetism in SU(N)-Symmetric Fermi Gases at Finite Temperature: First Order Phase Transitions and Time-Reversal Symmetry
Creators: name: Huang, Chen-How
name: Cazalilla, Miguel A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: At temperatures well below the Fermi temperature $T_F$, the coupling of magnetic fluctuations to particle-hole excitations in a two-component Fermi gas makes the transition to itinerant ferromagnetism a first order phase transition. This effect is not described by the paradigm of Landau's theory of phase transitions, which assumes the free energy is an analytic function of the order parameter and predicts a second order phase transition. On the other hand, despite that larger symmetry often introduces larger degeneracies in the low-lying states, here we show that for a Fermi gas with SU($N > 2$)-symmetry in three space dimensions the ferromangetic phase transition is first order in agreement with the predictions of Landau's theory [M. A. Cazalilla \emph{et al}. New J. of Phys. {\bf 11} 103033 (2009)]. By performing unrestricted Hartree-Fock calculations for an SU($N > 2$)-symmetric Fermi gas with short range interactions, we find the order parameter undergoes a finite jump across the transition. In addition, we do not observe any tri-critical point up to temperatures $T \simeq 0.5\: T_F$, for which the thermal smearing of the Fermi surface is subtantial. Going beyond mean-field, we find that the coupling of magnetic fluctuations to particle-hole excitations makes the transition more abrupt and further enhances the tendency of the gas to become fully polarized for smaller values of $N$ and the gas parameter $k_F a_s$. In our study, we also clarify the role of time reversal symmetry in the microscopic Hamiltonian and obtain the temperature dependence of Tan's contact. For the latter, the presence of the tri-critical point for $N = 2$ leads to a more pronounced temperature dependence around the transition than for SU($N > 2$)-symmetric gases.
description: 12 pages 6 figures
As tecnologias da informação e o agenciamento de viagens: um estudo no website da Operadora de Turismo CVC
Creators: name: Silva, Mayara C. De Medeiros
name: Guardia, Mabel S. De Araújo Bezerra
name: Guardia, Sérgio Ramiro Rivero
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2014

description: A internet destaca-se como uma das ferramentas que mais trouxe benefícios para as relações entre empresas e consumidores, pois proporcionou maior acesso à informação e facilitou a comunicação entre as pessoas. As agências de viagens por sua vez foram obrigadas a aderirem ao uso das novas tecnologias para se amoldar a um novo mercado. Tais empresas passaram a comercializar seus produtos e serviços utilizando-se de websites. Assim sendo, este estudo teve como objetivo avaliar o conteúdo e a qualidade das informações disponibilizadas no website da CVC, agência considerada como uma das melhores empresas de venda online do Brasil, a fim de identificar se o website possui problemas de usabilidade que podem afetar o atendimento das necessidades dos usuários. Para tanto, buscou-se na literatura discussões sobre tecnologias da informação, agências de viagens e usabilidade. Neste sentido, foi realizado um teste que permitiu a identificação de alguns problemas de usabilidade. Destaca-se, portanto, que o website analisado mesmo sendo uma ferramenta muito útil de compra e venda de serviços/produtos do setor de viagens e turismo, necessita de ajustes, para que assim possa atender com qualidade as necessidades dos seus usuários.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 21/22 (2014)
gamma-hadron correlations as a tool to trace the flow of energy lost from hard partons in heavy-ion collisions
Creators: name: Renk, Thorsten
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: High transverse momentum (P_T) gamma-hadron correlations are currently being regarded as the 'golden channel' for the study of the medium produced in ultrarelativistic heavy ion collisions by means of hard probes. This is due to several reasons, all linked to the fact that because of the smallness of the electromagnetic coupling alpha, the photon does not substantially interact with the medium and is expected to escape unmodified. Thus, a high P_T photon indicates a hard process in the collision independent of the position of the hard vertex. In contrast, there may not be a clear signal for a hard process involving strongly interacting partons if the production vertex is deep in the medium as both partons undergo substantial final state interaction. Equally important, if photon production by fragmentation can be separated experimentally, the photon provides almost full knowledge of the initial kinematics. In the present paper, these properties are used to demonstrate a distinguishing feature between two assumptions made in modelling the medium-modifications of strongly interacting high P_T processes: Loss of energy into the medium vs. medium modification of the partonic shower. Is it shown that gamma-hadron correlations provide a very clean signature to distinguish the two scenarios.
description: 6 pages, 1 figure
Organic Structures Emerging From Bio-Inspired Graph-Rewriting Automata
Creators: name: Cousin, Paul
name: Maignan, Aude
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Graph-Rewriting Automata (GRA) are an extension of Cellular Automata to a dynamic structure using local graph-rewriting rules. This work introduces linear algebra based tools that allow for a practical investigation of their behavior in deeply extended time scales. A natural subset of GRA is explored in different ways thereby demonstrating the benefits of this method. Some elements of the subset were discovered to create chaotic patterns of growth and others to generate organic-looking graph structures. These phenomena suggest a strong relevance of GRA in the modeling natural complex systems. The approach presented here can be easily adapted to a wide range of GRA beyond the chosen subset.
Synthesis and properties of 3-fold symmetrical hexabenzocoronene-bridged trinuclear alkynylgold(I) complexes
Creators: name: Zhang, Ming-Xing
name: Jin, Xuyang
name: Yang, Xiaofei
name: Xu, Zhiqiang
name: Liu, Sheng Hua
Publisher: name: Taylor & Francis
Year: 2021
Subjects: Biophysics
Biochemistry
Physical Sciences not elsewhere classified
Biotechnology
Chemical Sciences not elsewhere classified

description: Four 3-fold symmetrical hexabenzocoronene-bridged trinuclear alkynylgold(I) compounds with different isocyano groups have been synthesized and characterized by 1H, 13C NMR, HRMS (ESI) spectra and elemental analyses. The photophysical properties have been fully studied through UV − vis absorption and fluorescence emission spectra, combined with DFT/TDDFT theoretical calculations. The experimental results show that the optical properties of this large π-system is dominated by the c-HBC core with minor impact of isocyano-gold(I) component. In addition, the response of these large conjugated molecules to different anions was also studied by fluorescence emission spectroscopy. The research in this paper provides theoretical basis for the design and synthesis of functional molecular materials containing hexa-cata-hexabenzocoronenes (c-HBCs) and alkynylgold(I) units.
Restricted Schur Polynomials and Finite N Counting
Creators: name: Collins, Storm
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Restricted Schur polynomials have been posited as orthonormal operators for the change of basis from N=4 SYM to type IIB string theory [1,2,3,4]. In this letter we briefly expound the relationship found between the restricted Schurs and the operators found by Brown, Heslop and Ramgoolam in [5]. We then briefly examine the finite N counting of the restricted Schur polynomials.
description: 13 pages
Improved Factorization for Threshold Resummation in Heavy Quark to Heavy Quark Decays
Creators: name: Aglietti, U. G.
name: Ferrera, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the resummation of soft-gluon effects in heavy quark to heavy quark decays, namely the processes Q1 -> Q2 + (non QCD partons), where Q1 and Q2 are two different heavy quarks. We construct a new factorization scheme for threshold resummed spectra, which allows us to consistently evaluate the distribution of the final hadron invariant mass mX in all the kinematic regions, i.e. when mX is smaller, of the same order, or larger than the mass of the final quark Q2. A dependence of the Improved Coefficient Function on the threshold variable is introduced, which can however be relegated to a small interval of this variable by means of the so-called Partition of Unity. We explicitly apply our improved scheme to the b -> X_s + gamma decay at next-to-leading logarithmic accuracy.
description: 47 pages, 9 figures. Version accepted by the journal
Spatiality in small group interaction
Creators: name: Sela, Abraham
Publisher: name: University of British Columbia
Year: 2010

description: The social sciences have usually treated the physical environment in group interaction as a given, rather than as an influential factor on human behaviour. Recently, sociologists, psychologists, psychiatrists, architects and geographers have come to view the importance of the inter-relationship between man and his environment. This change of orientation, however, has begun to produce an overemphasis on the impact of the environment with a consequent neglect on the behavioural use: of the environment. A comprehensive ecological orientation must stress linkages in both directions - man's use of and affect on the environment and the effect and impact of the environment on man's behaviour. Although this thesis is not an empirical study, it does attempt, by a review of the literature available in this field, to show that man does not merely respond or adapt to his surroundings but constructs and modifies the environment in his interpersonal exchanges with others. The aim of this thesis is to underscore the fact that man's active use of the physical environment is a part of his non-verbal behaviour. This proposition is based on the demonstrable assumption that the spatial and physical properties of the environment are part and parcel of ongoing social interaction. The specific intent of the thesis is to integrate the research on spatial arrangement in small groups, to suggest some possible directions for further research in this field, and to note some potentially useful applications of the present findings. The thesis focuses on three major questions: 1) How man structures microspace; 2) How he relates physically to persons with whom he is interacting; 3) What is communicated by different spatial arrangements. The studies reviewed, though differing widely in approach and methodology, all denote the importance of spatiality in social interaction. Taken together, they reveal the conjoint functions of culture, personality, task, and environment in accounting for spatial arrangements in small groups. The arrangement of the thesis develops its focus from the most primary level, the individual, to the processes of interaction in small groups concerning spatial arrangement, spatial adjustment and interpersonal impact, to the level of the hierarchical organization of a group. The validity of the researchers' hypotheses is examined by brief evaluations of the methodologies of the various studies reported, leading to more general commentary about the state of research in this field. The body of the thesis contains four chapters which link the issue of spatiality to major themes in group interaction: emotional climate and attitude, nature of task, communication patterns, and leadership. The final section of each chapter points out some possible avenues of research and application, and a concluding chapter puts the issues of spatiality, nonverbal behaviour, and group interaction in integrated perspective.
Fra lex e pugna: il placito di Garfagnolo (1098)
Creators: name: Santoni, Francesca
Publisher: name: Scrineum Rivista
Year: 2013
Subjects: diplomatics; medieval law; placito di Garfagnolo

description: Considering once again a text like the well known and often studied ‘placito di Garfagnolo’ may allow us to focus on some mosaic tesserae, but even so the layout of this mosaic is still enigmatic. In a dialectic pattern between German law (normation by palatine Capitularia as well as juridical tradition, custom and rites) and Roman law (transmitted through the cultural mediation of the Church, but also rediscovered and reconsidered in the last decades of XI century), between solemn oaths and judiciary duels on one hand, and allegations of written law as well as royal and imperial documents on the other hand, we discover falsified documents produced in trial as evidences of proof, written by a well-read, highly capable scribe, still unknown to us, most certainly connected with Reggio Emilia’s bishopric.
description: Scrineum Rivista, 2 (2004)
Cosmological phase space of R^n gravity
Creators: name: Cervantes, Alejandro Aviles
name: Cervantes-Cota, Jorge L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present some exact solutions and a phase space analysis of metric $f(R)$-gravity models of the type $R^{n}$. We divide our discussion in $n\neq2$ and $n=2$ models. The later model is a good approximation, at late times to the $f(R) = \frac{2}πR \tan^{-1}(R/β^2)$ gravity model, being this an example of a non--singular case. For $n \neq 2$ models we have found power law solutions for the scale factor that are attractors and that comply with WMAP 5-years data if $n
description: 8 pages, 3 figures
Anufrievia drepanoides Lin & Zhang 2021, sp. nov.
Creators: name: Lin, Shuanghu
name: Zhang, Yalin
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Anufrievia
Anufrievia drepanoides

description: 2. Anufrievia drepanoides Lin & Zhang sp. nov.
(Figs 1e–h, 3)
 Description. Crown, face except anteclypeus and anterior margin of pronotum yellow-whitish. Central and hind part of pronotum, scutellum and anteclypeus brown. Scutum light yellowish. Paired blurred spots at transition from vertex to face brown. Eyes grey, and basal triangles blackish. Fore wing and hind wing light brown, transparent.
Abdominal apodemes narrow and short (Fig. 3b).
Pygofer side with 8 macrosetae at cephalo-ventral angle. Central part of subgenital plate with about 4 macrosetae in irregular row near lateral margin (Fig. 3a). Apex of dorsal appendage not bifurcated, base broad, tapering to apex, moderately curved, resembling horn in lateral view (Fig. 3d). Area between style apical and subapical teeth convex, resembling a sickle in lateral view, with apical tooth much longer than subapical tooth (Fig. 3e). Aedeagal shaft with no apical or subapical processes, gonopore subapical, pre-atrial process surpassing aedeagal shaft and almost straight (Figs 3g, h).
 Measurement. Length of male 2.7–2.9mm (including wing).
 Material examined. Holotype: ♂, CHINA, Yunnan Prov., Jinghong, 15 July 2017, coll. Weijian Huang.
 Remarks. This new species can be distinguished from other species in this genus by the style apex resembling a sickle in lateral view, the pre-atrial process surpassing the aedeagal shaft and the absence of processes on aedeagal shaft.
 Etymology. The specific epithet is derived from the Latin “drepanoides”, referring to the style apex resembling a sickle or hook in lateral view.
description: Published as part of Lin, Shuanghu & Zhang, Yalin, 2021, Taxonomic study of the leafhopper genus Anufrievia Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini) from China, with descriptions of two new species, pp. 438-444 in Zootaxa 5027 (3) on page 441, DOI: 10.11646/zootaxa.5027.3.9, http://zenodo.org/record/5449843
Measurements of Surface Diffusivity and Coarsening During Pulsed Laser Deposition
Creators: name: Ferguson, J. D.
name: Arikan, G.
name: Dale, D. S.
name: Woll, A. R.
name: Brock, J. D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Pulsed Laser Deposition (PLD) of homoepitaxial SrTiO3 <001> was studied with in-situ x-ray specular reflectivity and surface diffuse x-ray scattering. Unlike prior reflectivity-based studies, these measurements access both the time- and the length-scales of the evolution of the surface morphology during growth. In particular, we show that this technique allows direct measurements of the diffusivity for both inter- and intra-layer transport. Our results explicitly limit the possible role of island break-up, demonstrate the key roles played by nucleation and coarsening in PLD, and place an upper bound on the Ehrlich-Schwoebel (ES) barrier for downhill diffusion.
Memory signatures in path curvature of self-avoidant model particles are revealed by time delayed self mutual information
Creators: name: Daftari, Katherine
name: Newhall, Katherine A.
Publisher: name: Public Library of Science
Year: 2025

description: Emergent behavior in active systems is a complex byproduct of local, often pairwise, interactions. One such interaction is self-avoidance, which experimentally can arise as a response to self-generated environmental signals; such experiments have inspired non-Markovian mathematical models. In previous work, we set out to find “hallmarks of self-avoidant memory" in a particle model for environmentally responsive swimming droplets. In our analysis, we found that transient self-trapping was a spatial hallmark of the particle’s self-avoidant memory response. The self-trapping results from the combined effects of behaviors at multiple scales: random reorientations, which occur on the diffusion scale, and the self-avoidant memory response, which occurs on the ballistic (and longer) timescales. In this work, we use the path curvature as it encodes the self-trapping response to estimate an “effective memory lifetime" by analyzing the decay of its time-delayed mutual information and subsequently determining the longevity of significant nonlinear correlations. This effective memory lifetime (EML) is longer in systems where the curvature is a product of both self-avoidance and random reorientations as compared to systems without self-avoidance.
PrEP use and willingness cascades among GBMSM in 15 Asian countries/territories: an analysis of the PrEP APPEAL survey
Creators: name: Tieosapjaroen, Warittha
name: Ong, Jason J.
name: Bavinton, Benjamin R.
name: Suwandi, Nicky
name: Zhang, Lei
name: Dobbins, Timothy
name: Cassell, Michael
name: Wirawan, Gede Benny Setia
name: Fraser, Doug
name: Tang, Weiming
name: Phanuphak, Nittaya
name: Schimdt, Heather‐Marie
name: Green, Kimberly A.
name: Chan, Curtis
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2025

description: Introduction Despite the high HIV incidence among gay, bisexual and other men who have sex with men (GBMSM) and the demonstrated effectiveness of HIV pre‐exposure prophylaxis (PrEP), PrEP is not accessible at scale across Asia. To help inform future scaling efforts, our study aimed to examine PrEP use and willingness to use among GBMSM to identify opportunities and target groups for upscaling PrEP. Methods The PrEP APPEAL survey was a cross‐sectional survey, promoted through online advertising and community organizations, from May to November 2022. Eligible participants were adult GBMSM who self‐identified as HIV negative residing in Asia. We constructed two cascades: PrEP use (comprising awareness, lifetime use and current use of PrEP) and PrEP willingness among participants who were aware of PrEP but had never used it (comprising HIV exposure risk, willingness in PrEP and willingness to pay for PrEP). Multivariable logistic regression models identified factors associated with lifetime PrEP use and PrEP willingness. Results Of 15,339 participants, 1440 were excluded due to missing data, leaving 13,899 for analysis. Most lived in large or capital cities (68.3%) and in lower‐middle‐income countries (45.1%). The median age was 30 (25−36) years old. For the PrEP use cascade, 82.2% (n = 11,427/13,899) of participants were aware of PrEP, 35.0% (n = 4000/11,427) had used it before and 70.1% (n = 2803/4000) of them were currently on PrEP. For the PrEP willingness cascade, 54.8% of (n = 4068/7427) PrEP‐naïve participants engaged in one or more behaviours with a higher risk of HIV acquisition, 73.7% (n = 2996/4068) of them expressed willingness to use PrEP and 83.0% (n = 2487/2996) of them were willing to pay for PrEP. Multivariable logistic regression models identified system‐level (PrEP availability, accessibility and affordability) predictors of PrEP use. Individual‐level behaviours associated with higher HIV acquisition risks were associated with PrEP use and willingness. Conclusions While PrEP uptake was suboptimal, there was high awareness and willingness in PrEP among GBMSM. This is encouraging for future scale‐up efforts. Future PrEP programmes should address system‐level barriers to support PrEP uptake.
Jet-lag in Sgr A*: What size and timing measurements tell us about the central black hole in the Milky Way
Creators: name: Falcke, Heino
name: Markoff, Sera
name: Bower, Geoffrey C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The black hole at the Galactic Center, Sgr A*, is the prototype of a galactic nucleus at a very low level of activity. Its radio through submm-wave emission is known to come from a region close to the event horizon, however, the source of the emission is still under debate. A successful theory explaining the emission is based on a relativistic jet model scaled down from powerful quasars. We want to test the predictive power of this established jet model against newly available measurements of wavelength-dependent time lags and the size-wavelength structure in Sgr A*. Using all available closure amplitude VLBI data from different groups, we again derived the intrinsic wavelength-dependent size of Sgr A*. This allowed us to calculate the expected frequency-dependent time lags of radio flares, assuming a range of in- and outflow velocities. Moreover, we calculated the time lags expected in the previously published pressure-driven jet model. The predicted lags are then compared to radio monitoring observations at 22, 43, and 350 GHz. The combination of time lags and size measurements imply a mildly relativistic outflow with bulk outflow speeds of gamma*beta ~ 0.5-2. The newly measured time lags are reproduced well by the jet model without any major fine tuning. The results further strengthen the case for the cm-to-mm wave radio emission in Sgr A* as coming from a mildly relativistic jet-like outflow. The combination of radio time lag and VLBI closure amplitude measurements is a powerful new tool for assessing the flow speed and direction in Sgr A*. Future VLBI and time lag measurements over a range of wavelengths will reveal more information about Sgr A*, such as the existence of a jet nozzle, and measure the detailed velocity structure of a relativistic jet near its launching point for the first time.
description: Latex, 7 pages, accepted for publication in Astronomy & Astrophysics
Robust interaction control of a dielectric elastomer actuator with variable stiffness
Creators: name: Rizzello, Gianluca
name: Ferrante, Francesco
name: Naso, David
name: Seelecke, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents an interaction control algorithm for a dielectric elastomer membrane actuator. The proposed method permits efficient exploitation of the controllable stiffness of the material, allowing to use the membrane as a "programmable spring" in applications such as robotic manipulation or haptic devices. To achieve this goal, we propose a design algorithm based on robust control theory and linear matrix inequalities. The resulting controller permits to arbitrarily shape the stiffness of the elastomer, while providing robust stability and performance with respect to model nonlinearities. A self-sensing displacement estimation algorithm allows implementation of the method without the need of a deformation sensor, thus reducing cost and size of the system. The approach is validated on an experimental prototype consisting of an elastomer membrane preloaded with a bistable biasing spring.
Pedestrian index theorem a la Aharonov-Casher for bulk threshold modes in corrugated multilayer graphene
Creators: name: Kailasvuori, Janik
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Zero-modes, their topological degeneracy and relation to index theorems have attracted attention in the study of single- and bilayer graphene. For negligible scalar potentials, index theorems explain why the degeneracy of the zero-energy Landau level of a Dirac hamiltonian is not lifted by gauge field disorder, for example due to ripples, whereas other Landau levels become broadened by the inhomogenous effective magnetic field. That also the bilayer hamiltonian supports such protected bulk zero-modes was proved formally by Katsnelson and Prokhorova to hold on a compact manifold by using the Atiyah-Singer index theorem. Here we complement and generalize this result in a pedestrian way by pointing out that the simple argument by Aharonov and Casher for degenerate zero-modes of a Dirac hamiltonian in the infinite plane extends naturally to the multilayer case. The degeneracy remains, though at nonzero energy, also in the presence of a gap. These threshold modes make the spectrum asymmetric. The rest of the spectrum, however, remains symmetric even in arbitrary gauge fields, a fact related to supersymmetry. Possible benefits of this connection are discussed.
description: 6 pages, 2 figures. The second version states now also in words that the conjugation symmetry that in the massive case gets replaced by supersymmetry is the chiral symmetry. Changes in figure 2
Bounds on probability of transformations between multi-partite pure states
Creators: name: Cui, Wei
name: Helwig, Wolfram
name: Lo, Hoi-Kwong
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For a tripartite pure state of three qubits, it is well known that there are two inequivalent classes of genuine tripartite entanglement, namely the GHZ-class and the W-class. Any two states within the same class can be transformed into each other with stochastic local operations and classical communication (SLOCC) with a non-zero probability. The optimal conversion probability, however, is only known for special cases. Here, we derive new lower and upper bounds for the optimal probability of transformation from a GHZ-state to other states of the GHZ-class. A key idea in the derivation of the upper bounds is to consider the action of the LOCC protocol on a different input state, namely $1/\sqrt{2} [\ket{000} - \ket{111}]$, and demand that the probability of an outcome remains bounded by 1. We also find an upper bound for more general cases by using the constraints of the so-called interference term and 3-tangle. Moreover, we generalize some of our results to the case where each party holds a higher-dimensional system. In particular, we found that the GHZ state generalized to three qutrits, i.e., $\ket{\mathrm{GHZ}_3} = 1/\sqrt{3} [ \ket{000} + \ket{111} + \ket{222} ] $, shared among three parties can be transformed to {\it any} tripartite 3-qubit pure state with probability 1 via LOCC. Some of our results can also be generalized to the case of a multipartite state shared by more than three parties.
description: 16 pages, 11 figures
Protein absorption in the zebrafish gut is regulated by interactions between lysosome rich enterocytes and the microbiome
Creators: name: Wang S.
name: Liu R.
name: Rawls J.F.
name: Childers L
name: Barry R.
name: Bagnat M.
name: Watts S.A.
name: Park J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2025

description: Dietary protein absorption in neonatal mammals and fishes relies on the function of a specialized and conserved population of highly absorptive lysosome-rich enterocytes (LREs). The gut microbiome has been shown to enhance absorption of nutrients, such as lipids, by intestinal epithelial cells. However, whether protein absorption is also affected by the gut microbiome is poorly understood. Here, we investigate connections between protein absorption and microbes in the zebrafish gut. Using live microscopy-based quantitative assays, we find that microbes slow the pace of protein uptake and degradation in LREs. While microbes do not affect the number of absorbing LRE cells, microbes lower the expression of endocytic and protein digestion machinery in LREs. Using transgene-assisted cell isolation and single cell RNA-sequencing, we characterize all intestinal cells that take up dietary protein. We find that microbes affect expression of bacteria-sensing and metabolic pathways in LREs, and that some secretory cell types also take up protein and share components of protein uptake and digestion machinery with LREs. Using custom-formulated diets, we investigated the influence of diet and LRE activity on the gut microbiome. Impaired protein uptake activity in LREs, along with a protein-deficient diet, alters the microbial community and leads to an increased abundance of bacterial genera that have the capacity to reduce protein uptake in LREs. Together, these results reveal that diet-dependent reciprocal interactions between LREs and the gut microbiome regulate protein absorption.
Research Productivity and Its Relationship to Library Collections
Creators: name: Groote, Sandra L De
name: Scoulas, Jung Mi
name: Case, Mary M.
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: Objective – The purpose of this study was to explore in the current academic library environment, the relationship between library collections data (collections’ size, expenditures, and usage) and faculty productivity (scholarly output). The researchers also examined the degree to which new and existing library metrics predict faculty productivity.Methods – Demographic data (e.g., faculty size, student size, research and development expenditures), library budget data (e.g., collection expenditures), collection use data (e.g., full-text article requests and database searches), and publication output for 81 doctoral granting universities in the United States were collected to explore potential relationships between research productivity, collection use, library budgets, collection size, and research expenditures using partial correlations. A hierarchical multiple regression was also used to ascertain the significance of certain predictors of research productivity (publications).Results – A correlation existed between the number of publications (research productivity) and library expenditures (total library expenditures, total library material expenditures, and ongoing library resource expenditures), collection size (volumes, titles, and ebooks), use of collection (full-text article requests and total number of references in the articles), and research and development expenditures. Another key finding from the hierarchical multiple regression analysis showed that full-text article requests were the best predictor of research productivity, which uniquely explained 10.2% of the variation in publication.Conclusion – The primary findings were that full-text article requests, followed by library material expenditures and research expenditures, were found to be the best predictor of research productivity as measured by articles p
Towards Trustworthy Cross-patient Model Development
Creators: name: El-Merhi, Ali
name: Hergés, Helena Odenstedt
name: Block, Linda
name: Elam, Mikael
name: Vithal, Richard
name: Liljencrantz, Jaquette
name: Staron, Miroslaw
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Machine learning is used in medicine to support physicians in examination, diagnosis, and predicting outcomes. One of the most dynamic area is the usage of patient generated health data from intensive care units. The goal of this paper is to demonstrate how we advance cross-patient ML model development by combining the patient's demographics data with their physiological data. We used a population of patients undergoing Carotid Enderarterectomy (CEA), where we studied differences in model performance and explainability when trained for all patients and one patient at a time. The results show that patients' demographics has a large impact on the performance and explainability and thus trustworthiness. We conclude that we can increase trust in ML models in a cross-patient context, by careful selection of models and patients based on their demographics and the surgical procedure.