cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Trapping and extreme clustering of finitely-dense inertial particles near a rotating vortex pair
Creators: name: Kapoor, Saumav
name: Jaganathan, Divya
name: Govindarajan, Rama
Publisher: name: arXiv
Year: 2024
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Small heavy particles cannot get attracted into a region of closed streamlines in a non-accelerating frame (Sapsis & Haller 2010). In a rotating system, however, particles can get trapped (Angilella 2010) near vortices. We perform numerical simulations examining trapping of inertial particles in a prototypical rotating flow: an identical pair of rotating Lamb-Oseen vortices, without gravity. Our parameter space includes the particle Stokes number $St$, measuring the particle's inertia, and a density parameter $R$, measuring the particle-to-fluid relative density. We focus on inertial particles that are finitely denser than the fluid. Particles can get indefinitely trapped near the vortices and display extreme clustering into smaller dimensional objects: attracting fixed-points, limit cycles and chaotic attractors. As $St$ increases for a given $R$, we may have an incomplete or complete period-doubling route to chaos, as well as an unusual period-halving route back to a fixed-point attractor. The fraction of trapped particles can vary non-monotonically with $St$. We may even have windows in $St$ for which no particle trapping occurs. At $St$ larger than a critical value, beyond no trapping occurs, significant fractions of particles can spend long but finite times in the vortex vicinity. The inclusion of the Basset-Boussinesq history (BBH) force is imperative in our study due to particle's finite density. BBH force significantly increases the basin of attraction as well as the range of $St$ where trapping can occur. Extreme clustering can be physically significant in planetesimal formation by dust aggregation in protoplanetary disks, phytoplankton aggregation in oceans, etc.
A AGRICULTURA FAMILIAR E A CONSTRUÇÃO DA SEGURANÇA ALIMENTAR E NUTRICIONAL:A MULTIFUNCIONALIDADE COMO FATOR DE RESISTÊNCIA À INSEGURANÇA ALIMENTAR
Creators: name: Gomes Junior, Newton Narciso
name: Botelho Filho, Flavio Borges
name: Gomes Junior, Newton Narciso
name: Botelho Filho, Flavio Borges
Publisher: name: Unknown
Year: 2008
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: multifuncionalidade
subject: segurança alimentar e nutricional
subject: insegurança alimentar
subject: agricultura familiar
subject: Food and Nutritional Safety
subject: Food Insecurity
subject: Farm family
subject: Multifuncionality

description: A discussão aqui apresentada, parte da noção de multifuncionalidade na agricultura familiar e argumenta sobre sua relevância na construção de mecanismos de resistência aos processos de fragmentação de práticas e hábitos alimentares em curso na atualidade e que comprometem a segurança alimentar e nutricional na sociedade.---------------------------------------------- In this paper are discussed, from the sphere of multifuncionality of the farm family, the importance of its aspects in the construction of a resistence against the practices and food habits fragmentation that can result in a food insecurity.
An automated pipeline for the discovery of conspiracy and conspiracy theory narrative frameworks: Bridgegate, Pizzagate and storytelling on the web
Creators: name: Tangherlini, Timothy R.
name: Shahsavari, Shadi
name: Shahbazi, Behnam
name: Ebrahimzadeh, Ehsan
name: Roychowdhury, Vwani
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Although a great deal of attention has been paid to how conspiracy theories circulate on social media and their factual counterpart conspiracies, there has been little computational work done on describing their narrative structures. We present an automated pipeline for the discovery and description of the generative narrative frameworks of conspiracy theories on social media, and actual conspiracies reported in the news media. We base this work on two separate repositories of posts and news articles describing the well-known conspiracy theory Pizzagate from 2016, and the New Jersey conspiracy Bridgegate from 2013. We formulate a graphical generative machine learning model where nodes represent actors/actants, and multi-edges and self-loops among nodes capture context-specific relationships. Posts and news items are viewed as samples of subgraphs of the hidden narrative network. The problem of reconstructing the underlying structure is posed as a latent model estimation problem. We automatically extract and aggregate the actants and their relationships from the posts and articles. We capture context specific actants and interactant relationships by developing a system of supernodes and subnodes. We use these to construct a network, which constitutes the underlying narrative framework. We show how the Pizzagate framework relies on the conspiracy theorists' interpretation of "hidden knowledge" to link otherwise unlinked domains of human interaction, and hypothesize that this multi-domain focus is an important feature of conspiracy theories. While Pizzagate relies on the alignment of multiple domains, Bridgegate remains firmly rooted in the single domain of New Jersey politics. We hypothesize that the narrative framework of a conspiracy theory might stabilize quickly in contrast to the narrative framework of an actual one, which may develop more slowly as revelations come to light.
description: conspiracy theory, narrative structure
Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27
Creators: name: Amati, L.
name: Frontera, F.
name: Zand, J. J. M. in 't
name: Capalbi, M.
name: Landi, R.
name: Soffitta, P.
name: Vetere, L.
name: Antonelli, L. A.
name: Costa, E.
name: Del Sordo, S.
name: Feroci, M.
name: Guidorzi, C.
name: Heise, J.
name: Masetti, N.
name: Montanari, E.
name: Nicastro, L.
name: Palazzi, E.
name: Piro, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the X-ray observations of the X-ray flash (XRF) which occurred on 2002 April 27, three days before BeppoSAX was switched off. The event was detected with the BeppoSAX Wide Field Cameras but not with the Gamma ray Burst Monitor. A follow-up observation with the BeppoSAX Narrow Field Instruments was soon performed and a candidate afterglow source was discovered. We present the results obtained. We also include the results obtained from the observations of the XRF field with the Chandra X-ray satellite. The spectral analysis of the prompt emission shows that the peak energy of the EF(E) spectrum is lower than 5.5 keV, with negligible spectral evolution. The X-ray afterglow spectrum is consistent with a power law model with photon index of about 2, while the 2-10 keV flux fades as a power law with a decay index -1.33. Both these indices are typical of GRBs. A very marginal excess around 4.5-5 keV is found in the afterglow spectrum measured by BeppoSAX . As for many GRBs, the extrapolation of the 2-10 keV fading law back to the time of the prompt emission is consistent with the X-ray flux measured during the second part of the event. We estimate a possible range of values of the redshift and discuss our results in the light of current models of XRFs.
description: 10 pages, 8 figures, accepted for pubblication in Astronomy & Astrophysics, main journal
REDE DE DINAMIZAÇÃO DAS FEIRAS DA AGRICULTURA FAMILIAR – REDIFEIRA: UMA ALTERNATIVA PARA A INCLUSÃO SOCIOECONÔMICA DAS FAMÍLIAS RURAIS
Creators: name: Michellon, Ednaldo
name: Costa, Tiago Ribeiro
name: Stroher, Gisiane July
name: Camacho, Lucas Souza
name: Pereira, Paulo Sipoli
name: Michellon, Ednaldo
name: Costa, Tiago Ribeiro
name: Stroher, Gisiane July
name: Camacho, Lucas Souza
name: Pereira, Paulo Sipoli
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agribusiness
subject: Agricultura Familiar
subject: Comercialização
subject: Feira do Produtor
subject: REDIfeira
subject: Commercialization
subject: Fair of the Producer
subject: Familiar Agriculture

description: A Rede de Dinamização das Feiras da Agricultura Familiar – REDIfeira, projeto integrante do Programa de Extensão Universitária – Universidade Sem Fronteiras, da Secretaria de Ciência, Tecnologia e Ensino Superior (SETI) do Governo do Estado do Paraná, tem como objetivo, dinamizar a produção e a comercialização dos produtos produzidos pela Agricultura Familiar nos municípios do Programa de Desenvolvimento da Região da Associação dos Municípios do Setentrião Paranaense – PRÓ-AMUSEP, fazendo-o através de um acompanhamento das atividades destes agricultores/as familiares, no âmbito da Assistência Técnica e Extensão Rural humanizadora, em sua principal atividade de comercialização: as Feiras de Produtores. Através de pesquisas de campo realizadas tanto com os feirantes como com os consumidores, busca-se traçar um perfil da atividade, dando ênfase à detecção de prováveis entraves no processo de comercialização e às perspectivas de sua organização, observadas pelos protagonistas sobre o futuro desta atividade, tão importante no cenário local como instrumento de desenvolvimento econômico e social.------------------------------------------The Net of Dinamization of the Fairs of Familiar Agriculture - REDIfeira, integrant project of the Program of University Extension, Universidade Sem Fronteiras, of the Government of the State of the Paraná - Secretariat of Science, Technology and Superior Education (SETI) has as objective, to dinamize the production and the commercialization of the products produced for Familiar Agriculture in the cities of the Program of Development of the Region of the Cities Association of the Cities of the Northern Paranaense - PRÓ-AMUSEP, making through a accompaniment of the familiar activities of these agriculturist, in the scope of the Assistance Technique and humanizated Agricultural Extension, in its main activity of commercialization: the Fairs of Producers. Through carried through research of field in such a way with the merchants as with the consumers, one searched to trace a profile of the activity, giving emphasis to the detention of probable impediments in the process of commercialization and to the perspectives of its organization, observed for the protagonists on the future of this activity, so important in the local scene as instrument of economic and social development.
The Memory of the Past: the Achaemenid Legacy in the Arsakid Period
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: 210108 Historical Archaeology (incl. Industrial Archaeology)
subject: FOS: History and archaeology
subject: History
subject: 210302 Asian History
subject: 220209 History of Ideas
subject: FOS: Philosophy, ethics and religion
subject: 219999 History and Archaeology not elsewhere classified
subject: 210310 Middle Eastern and African History
subject: 210306 Classical Greek and Roman History

description: Marek Jan Olbrycht, The Memory of the Past: the Achaemenid Legacy in the Arsakid Period, Studia Litteraria Universitatis Iagellonicae Cracoviensis , 2019, Volume 14, Special Issue, p. 175–186. DOI: 10.4467/20843933ST.19.032.10975
https://www.researchgate.net/publication/337096544_The_Memory_of_the_Past_the_Achaemenid_Legacy_in_the_Arsakid_Period
A radio study of the superwind galaxy NGC1482
Creators: name: Hota, Ananda
name: Saikia, D. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present multifrequency radio continuum as well as HI observations of the superwind galaxy NGC1482, with both the GMRT and the VLA. This galaxy has a remarkable hourglass-shaped optical emission line outflow as well as bi-polar soft X-ray bubbles on opposite sides of the galactic disk. The low-frequency, lower-resolution radio observations show a smooth structure. From the non-thermal emission, we estimate the available energy in supernovae, and examine whether this would be adequate to drive the observed superwind outflow. The high-frequency, high-resolution radio images of the central starburst region located at the base of the superwind bi-cone shows one prominent peak and more extended emission with substructure. This image has been compared with the infrared, optical red-continuum, H_alpha, and, soft and hard X-ray images from Chandra. The peak of infrared emission is the only feature which is coincident with the prominent radio peak, and possibly defines the centre of the galaxy. The HI observations with the GMRT show two blobs of emission on opposite sides of the central region. These are rotating about the centre of the galaxy and are located at ~2.4 kpc from it. In addition, these observations also reveal a multicomponent HI-absorption profile against the central region of the radio source, with a total width of ~250 km/s. The extreme blue- and red-shifted absorption components are at 1688 and 1942 km/s respectively, while the peak absorption is at 1836 km/s. This is consistent with the heliocentric systemic velocity of 1850+/-20 km/s, estimated from a variety of observations. We discuss possible implications of these results.
description: 11 pages, 10 figures, 4 tables, accepted for publication in MNRAS
Memory-corrected quantum repeaters with adaptive syndrome identification
Creators: name: Romanova, Alena
name: van Loock, Peter
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the challenge of incorporating encoded quantum memories into an exact secret key rate analysis for small and intermediate-scale quantum repeaters. To this end, we introduce the check matrix model and quantify the resilience of stabilizer codes of up to eleven qubits against Pauli noise, obtaining analytical expressions for effective logical error probabilities. Generally, we find that the five-qubit and Steane codes either outperform more complex, larger codes in the experimentally relevant parameter regimes or have a lower resource overhead. Subsequently, we apply our results to calculate lower bounds on the asymptotic secret key rate in memory-corrected quantum repeaters when using the five-qubit or Steane codes on the memory qubits. The five-qubit code drastically increases the effective memory coherence time, reducing a phase flip probability of $1\%$ to $0.001\%$ when employing an error syndrome identification adapted to the quantum noise channel. Furthermore, it mitigates the impact of faulty Bell state measurements and imperfect state preparation, lowering the minimally required depolarization parameter for non-zero secret key rates in an eight-segment repeater from $98.4\%$ to $96.4\%$. As a result, the memory-corrected quantum repeater can often generate secret keys in experimental parameter regimes where the unencoded repeater fails to produce a secret key. In an eight-segment repeater, one can even achieve non-vanishing secret key rates up to distances of 2000 km for memory coherence times of $t_c = 10$ s or less using multiplexing. Assuming a zero-distance link-coupling efficiency $p_0 = 0.7$, a depolarization parameter $μ= 0.99$, $t_c = 10$ s, and an 800 km total repeater length, we obtain a secret key rate of 4.85 Hz, beating both the unencoded repeater that provides 1.25 Hz and ideal twin-field quantum key distribution with 0.71 Hz at GHz clock rates.
On the number of distinct roots of a lacunary polynomial over finite fields
Creators: name: Solymosi, Jozsef
name: White, Ethan P.
name: Yip, Chi Hoi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11T06

description: We obtain new upper bounds on the number of distinct roots of lacunary polynomials over finite fields. Our focus will be on polynomials for which there is a large gap between consecutive exponents in the monomial expansion.
description: 16 pages, 3 figures
Impactos da crise financeira internacional e da influenza A sobre as exportações brasileiras de carne suína
Creators: name: Ferreira, Marcelo Dias Paes
name: Sousa, Lucas Oliveira De
name: Mattos, Leonardo Bornacki De
name: Campos, Antonio Carvalho
name: Ferreira, Marcelo Dias Paes
name: Sousa, Lucas Oliveira De
name: Mattos, Leonardo Bornacki De
name: Campos, Antonio Carvalho
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: International shocks
subject: International trade
subject: Intervention analyses

description: The Brazilian pork exports have been affected by several shocks on the 2000s. This paper aimed to analyze these shocks. The focus of this papers are the main international shocks on the last years: the international economics crisis and de influenza A (H1N1). Analyses were made over the main Brazilian pork exports destinations: Russia and Hong Kong. The theory of international trade was used as a theoretical framework and analysis of intervention provided methodological support. The results show that the quantum exported to Russia has not been affected by the recent shocks. However the prices was negatively affected by crisis in the short term. The quantum exported and the exports prices to Hong Kong have been negatively affected by crisis in the short term. The influenza also has the negative impact over quantum exported to Hong Kong
LP 349-25: a new tight M8V binary
Creators: name: Forveille, T.
name: Beuzit, J. -L.
name: Delorme, P.
name: Ségransan, D.
name: Delfosse, X.
name: Chauvin, G.
name: Fusco, T.
name: Lagrange, A. -M.
name: Mayor, M.
name: Montagnier, G.
name: Mouillet, D.
name: Perrier, C.
name: Udry, S.
name: Charton, J.
name: Gigan, P.
name: Conan, J. -M.
name: Kern, P.
name: Michet, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the discovery of a tight M8V binary, with a separation of only 1.2 astronomical units, obtained with the PUEO and NACO adaptive optics systems, respectively at the CFHT and VLT telescopes. The estimated period of LP 349-25 is approximately 5 years, and this makes it an excellent candidate for a precise mass measurement.
description: Accepted by Astronomy and Astrophysics Letters
Distribution of the S-matrix in chaotic microwave cavities with direct processes and absorption
Creators: name: Kuhl, U.
name: Martinez-Mares, M.
name: Mendez-Sanchez, R. A.
name: Stoeckmann, H. -J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We quantify the presence of direct processes in the S-matrix of chaotic microwave cavities with absorption in the one-channel case. To this end the full distribution P_S(S) of the S-matrix, i.e. S=\sqrt{R}e^{iθ}, is studied in cavities with time-reversal symmetry for different antenna coupling strengths T_a or direct processes. The experimental results are compared with random-matrix calculations and with numerical simulations based on the Heidelberg approach including absorption. The theoretical result is a generalization of the Poisson kernel. The experimental and the numerical distributions are in excellent agreement with random-matrix predictions for all cases.
description: 4 pages, 4 figures
Partnership Academic Literacy Programme
Creators: name: Webster, Simon
Publisher: name: figshare
Year: 2020
Subjects: subject: 200401 Applied Linguistics and Educational Linguistics
subject: FOS: Languages and literature
subject: 200303 English as a Second Language
subject: 200302 English Language

description: This case study research evaluates an in-sessional support programme which was developed as a partnership between EAP practitioners and academic staff from the receiving department. With data generated both from these two principal stakeholders and from the learners on the programme, the research explores the dynamics of the programme design process, the principles on which the programme was constructed and the effectiveness of the programme as an intervention within this specific academic context. A key focus of the paper, however, is also an exploration of the means by which such a programme can be most meaningfully evaluated as a result of the interplay between the stakeholders involved. Based on the findings, therefore, the key emerging issues are represented in a model which recognises the dynamic nature of in-sessional language programme design and the inter-relatedness of the interests of the different stakeholders. This proposed model potentially serves to inform decision-making regarding both the initial design and the subsequent evaluation of embedded in-sessional programmes in a range of contexts.
A Coupled Cavity Micro Fluidic Dye Ring Laser
Creators: name: Gersborg-Hansen, M.
name: Balslev, S.
name: Mortensen, N. A.
name: Kristensen, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optics (physics.optics)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a laterally emitting, coupled cavity micro fluidic dye ring laser, suitable for integration into lab-on-a-chip micro systems. The micro-fluidic laser has been successfully designed, fabricated, characterized and modelled. The resonator is formed by a micro-fluidic channel bounded by two isosceles triangle mirrors. The micro-fluidic laser structure is defined using photo lithography in 10 microns thick SU-8 polymer on a glass substrate. The micro fluidic channel is sealed by a glass lid, using PMMA adhesive bonding. The laser is characterized using the laser dye Rhodamine 6G dissolved in ethanol or ethylene glycol as the active gain medium, which is pumped through the micro-fluidic channel and laser resonator. The dye laser is optically pumped normal to the chip plane at 532 nm by a pulsed, frequency doubled Nd:YAG laser and lasing is observed with a threshold pump pulse energy flux of around 55 micro-Joule/square-milimeter. The lasing is multi-mode, and the laser has switchable output coupling into an integrated polymer planar waveguide. Tuning of the lasing wavelength is feasible by changing the dye/solvent properties.
description: Accepted for Microelectronic Engineering
The Conway function of a splice
Creators: name: Cimasoni, David
Publisher: name: arXiv
Year: 2004
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: We give a closed formula for the Conway function of a splice in terms of the Conway function of its splice components. As corollaries, we refine and generalize results of Seifert, Torres, and Sumners-Woods.
description: 12 pages, 1 figure
Calibration of second-order correlation functions for non-stationary sources with a multi-start multi-stop time-to-digital converter
Creators: name: Choi, Wonshik
name: Lee, Moonjoo
name: Lee, Ye-Ryoung
name: Park, Changsoon
name: Lee, Jai-Hyung
name: An, Kyungwon
name: Fang-Yen, C.
name: Dasari, R. R.
name: Feld, M. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A novel high-throughput second-order-correlation measurement system is developed which records and makes use of all the arrival times of photons detected at both start and stop detectors. This system is suitable particularly for a light source having a high photon flux and a long coherence time since it is more efficient than conventional methods by an amount equal to the product of the count rate and the correlation time of the light source. We have used this system in carefully investigating the dead time effects of detectors and photon counters on the second-order correlation function in the two-detector configuration. For a non-stationary light source, distortion of original signal was observed at high photon flux. A systematic way of calibrating the second-order correlation function has been devised by introducing a concept of an effective dead time of the entire measurement system.
description: 7 pages, 6 figures
Renormalization of many body fermion models with singular fermi surfaces
Creators: name: Brox, Daniel S.
Publisher: name: University of British Columbia
Year: 2009

description: The physical system modelled is a periodic lattice that provides a background for interacting fermions. An effective model of the interacting fermions at zero temperature may be studied using standard techniques of many-body quantum mechanics. All the physical information of such a system is encoded in its Schwinger's functions that tell us how states evolve in time and what the matrix elements of all operators are. It is natural to do calculations on the interacting system by treating it as a perturbation of the corresponding noninteracting system, as the eigenstates and energy levels of the latter are known. All Schwinger functions may be conveniently cast in the path integral formalism, and combined into a generating functional. The Schwinger functions are shown to be sums of Feynman diagrams, where the electron propagators blow-up at the Fermi surface. Power counting is described and used to reveal subdiagram divergences. Renormalization via the renormalized Gallavotti-Nicolo Tree Expansion is implemented in an attempt to circumvent these subdiagram divergences and obtain finite values for the Schwinger functions. It is shown that if the Fermi surface has at worst quadratic singularities, the perturbation coefficients of the renormalizing counterterms are finite and remain so as the infrared cutoff is removed.
Daggers in Parthian Iran
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: 210102 Archaeological Science
subject: FOS: History and archaeology
subject: 210108 Historical Archaeology (incl. Industrial Archaeology)
subject: 219999 History and Archaeology not elsewhere classified
subject: 210199 Archaeology not elsewhere classified
subject: 210105 Archaeology of Europe, the Mediterranean and the Levant
subject: 210103 Archaeology of Asia, Africa and the Americas
subject: History
subject: 210302 Asian History

description: Olbrycht M.J., Daggers in Parthian Iran. In: Niknami KA., Hozhabri A. (eds), Archaeology of Iran in the Historical Period. University of Tehran Science and Humanities Series. Springer, Cham, 2020, pp. 231-243.
DOI: https://doi.org/10.1007/978-3-030-41776-5_19
Determinantes sociais da leishmaniose visceral no norte de Minas Gerais
Creators: name: Mendes, Chrystian Soares
name: Lopes, Luckas Sabioni
name: Toyoshima, Silvia Harumi
name: Mendes, Chrystian Soares
name: Lopes, Luckas Sabioni
name: Toyoshima, Silvia Harumi
Publisher: name: Unknown
Year: 2011
Subjects: subject: Health Economics and Policy
subject: Visceral Leishmaniasis
subject: Social Determinants
subject: North Minas
subject: Multivariate Analysis

description: Visceral Leishmaniasis (VL) is a typical tropical zoonosis, transmitted by the female insect of the genus Lutzomyia longipalpis. Brazil is one of the countries that have suffered with this disease, given the great changes in the natural environment of the mosquito, due to the growth of cities and exacerbated deforestation of riparian forest. In the country, the State of Minas Gerais is the third in numbers of cases of LV, where the North Mesorregion shows the great number of incidences. Therefore, the objective of this study was to evaluate the influence of LV´s socio-economic indicators in this region. It created and discriminated municipalities´ groups according to the incidence of this zoonosis in the period 1998 to 2008 using the multivariate statistics. It was noticed that LV was not reduced over the years; on the contrary it increased. The Municipality of Matias Cardoso had the largest increase in this period (550%). Regarding the discrimination of the groups, there was the strong influence of urbanization and the importance of sanitation in combating the vector. The education and the public policies aimed at awareness of the population is also necessary to have adequate control of the disease
Leptogenesis and low-energy CP violation in a type-II-dominated left-right seesaw model
Creators: name: Rink, Thomas
name: Rodejohann, Werner
name: Schmitz, Kai
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider leptogenesis in a left-right-symmetric seesaw scenario in which neutrino mass generation and leptogenesis are dominated by the type-II seesaw term. Motivated by grand unification, we assume that the neutrino Dirac mass matrix is dominated by a single entry of the order of the top-quark mass, which leaves the low-energy phases of the lepton mixing matrix as the only sources of CP violation. Working in a regime where the triplet scalar predominantly decays into leptons, this results in a predictive scenario based on a minimal number of parameters. We perform a detailed analysis of the flavored Boltzmann equations within a revised density matrix framework and demonstrate that the observed baryon asymmetry can be successfully generated in this simple model. We point out that the significance of flavor effects is limited, and we discuss the implications for low-energy observables such as the Dirac CP phase and neutrinoless double beta decay.
description: 40 pages, 9 figures, 3 tables; minor text revisions, new benchmark values, plots and results updated, matches published version in NPB
Phenomenology of many-body localization in bond-disordered spin chains
Creators: name: Aramthottil, Adith Sai
name: Sierant, Piotr
name: Lewenstein, Maciej
name: Zakrzewski, Jakub
Publisher: name: arXiv
Year: 2024
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Many-body localization (MBL) hinders the thermalization of quantum many-body systems in the presence of strong disorder. In this work, we study the MBL regime in bond-disordered spin-1/2 XXZ spin chain, finding the multimodal distribution of entanglement entropy in eigenstates, sub-Poissonian level statistics, and revealing a relation between operators and initial states required for examining the breakdown of thermalization in the time evolution of the system. We employ a real space renormalization group scheme to identify these phenomenological features of the MBL regime that extend beyond the standard picture of local integrals of motion relevant for systems with disorder coupled to on-site operators. Our results pave the way for experimental probing of MBL in bond-disordered spin chains.
description: close to published version glued with supplementary
Análise de sustentabilidade dos beneficiados do Programa Cédula da Terra no município de Sobral, estado do Ceará
Creators: name: Parente, Thiago Dias
name: Tabosa, Francisco Jose Silva
name: Mayorga, Fernando Daniel De Oliveira
name: Oliveira, Silvando Carmo De
name: Parente, Thiago Dias
name: Tabosa, Francisco Jose Silva
name: Mayorga, Fernando Daniel De Oliveira
name: Oliveira, Silvando Carmo De
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Sustainable Development
subject: Cédula da Terra Program
subject: Sobral

description: The objective of this study is examining the sustainability of settlements of the Cedula da Terra Program, in the municipality of Sobral. For this, was prepared an index of Sustainability (IS) whereas different variables representing economic and social development, social capital and environmental settlements. It is based on studies undertaken by Barreto, Khan and Lima (2005). The results showed an high level of Sustainability for Macapa and average level of Sustainability for the São João and Picada
The local Gromov-Witten invariants of configurations of rational curves
Creators: name: Karp, Dagan
Publisher: name: University of British Columbia
Year: 2009

description: We compute the local Gromov-Witten invariants of certain configurations of rational curves in a Calabi-Yau threefold. We first transform this from a problem involving local Gromov-Witten invariants to one involving global or ordinary invariants. We do so by expressing the local invariants of a configuration of curves in terms of ordinary Gromov-Witten invariants of a blowup of CP3 at points. The Gromov- Witten invariants of a blowup of CP3 along points have a symmetry, which arises from the geometry of the Cremona transformation, and transforms some difficult to compute invariants into others that are less difficult or already known. This symmetry is then used to compute the global invariants.
Tunable Spatiotemporal Orders in Driven Insulators
Creators: name: Kaplan, Daniel
name: Volkov, Pavel A.
name: Chakraborty, Ahana
name: Zhuang, Zekun
name: Chandra, Premala
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that driving optical phonons above a threshold fluence induces spatiotemporal orders, where material properties oscillate at an incommensurate wavevector $q_0$ in space and at half the drive frequency in time. The order is robust against temperature on timescales much larger than the lifetime of the excited modes and can be accompanied by a static $2q_0$ modulation. We make predictions for time-resolved diffraction and provide estimates for candidate materials. Our results show the possibility of using THz waves in solids to realize tunable incommensurate order on the nanoscale.
description: 5 pages, 4 figures + supplementary information. Close to published version. Editors' suggestion
Enhancing Solar Thermal Energy Conversion with Silicon-cored Tungsten Nanowire Selective Metamaterial Absorbers
Creators: name: Chang, Jui-Yung
name: Taylor, Sydney
name: McBurney, Ryan
name: Ying, Xiaoyan
name: Allu, Ganesh
name: Chen, Yu-Bin
name: Wang, Liping
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This work experimentally studies silicon-cored tungsten nanowire selective metamaterial absorber to enhance solar-thermal energy harvesting, simply fabricated by conformally coating a thin tungsten layer onto a commercial silicon nanowire stamp. Scanning electron microscopy is used to characterize the morphology change before and after the tungsten deposition, while optical spectroscopy is carried out to measure the spectral absorptance (or emittance) in the broad wavelength range from solar spectrum to infrared. It is shown that the tungsten nanowire absorber exhibits almost the same total solar absorptance around 0.85 as the silicon nanowire but with greatly reduced total emittance down to 0.18, which could significantly suppress the infrared emission heat loss. A lab-scale solar-thermal test apparatus is used to measure the solar-thermal efficiency of the tungsten nanowire absorbers from 1 up to 20 suns, experimentally demonstrating the improved performance due to excellent spectral selectivity over the silicon nanowire and black absorbers. With detailed heat transfer analysis, it is found that the tungsten nanowire absorber achieves an experimental efficiency of 41% at temperature 203degC during the solar-thermal test with stagnation temperature 273degC under 6.3 suns. It is projected to reach 74% efficiency at same temperature 203degC with stagnation temperature of 430degC for practical application without parasitic radiative losses from side and bottom surfaces, greatly outperforming the silicon nanowire and black absorbers. The results would facilitate the development of novel metamaterial selective absorbers at low cost for highly-efficient solar thermal energy systems.
Evidence of a counterrotating core in the Large Magellanic Cloud
Creators: name: Subramaniam, Annapurni
name: Prabhu, Tushar P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Stellar radial velocity in the central region of the Large Magellanic Cloud (LMC) is used to estimate the radial velocity curve along various position angles (PA) including the line of nodes (LON). The central part of the radial velocity profile, along the LON, shows a V-shaped profile - a clear indication of counterrotation. The counterrotating region and the secondary bar have similar location and PA. The origin of the counter-rotating core could be internal(secondary bar) or external(accretion). To explain the observed velocity profile, we propose the existence of two disks in the inner LMC, with one counterrotating. This two disk model is found to match the HI velocities as well. Two disks with different LON and velocity profiles can create regions which are kinematically and spatially separated. Predicted such locations are found to match the observed locations where the HI clouds are found to have two velocities.
description: 12 pages including 3 figures, to appear in ApJ Letters
Blowin' in the non-isothermal wind: core-powered mass loss with hydrodynamic radiative transfer
Creators: name: Misener, William
name: Schulik, Matthäus
name: Schlichting, Hilke E.
name: Owen, James E.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The mass loss rates of planets undergoing core-powered escape are usually modeled using an isothermal Parker-type wind at the equilibrium temperature, $T_\mathrm{eq}$. However, the upper atmospheres of sub-Neptunes may not be isothermal if there are significant differences between the opacity to incident visible and outgoing infrared radiation. We model bolometrically-driven escape using aiolos, a hydrodynamic radiative-transfer code that incorporates double-gray opacities, to investigate the process's dependence on the visible-to-infrared opacity ratio, $γ$. For a value of $γ\approx 1$, we find that the resulting mass loss rates are well-approximated by a Parker-type wind with an isothermal temperature $T = T_\mathrm{eq}/2^{1/4}$. However, we show that over a range of physically plausible values of $γ$, the mass loss rates can vary by orders of magnitude, ranging from $10^{-5} \times$ the isothermal rate for low $γ$ to $10^5 \times$ the isothermal rate for high $γ$. The differences in mass loss rates are largest for small planet radii, while for large planet radii, mass loss rates become nearly independent of $γ$ and approach the isothermal approximation. We incorporate these opacity-dependent mass loss rates into a self-consistent planetary mass and energy evolution model and show that lower/higher $γ$ values lead to more/less hydrogen being retained after core-powered mass loss. In some cases, the choice of opacities determines whether or not a planet can retain a significant primordial hydrogen atmosphere. The dependence of escape rate on the opacity ratio may allow atmospheric escape observations to directly constrain a planet's opacities and therefore its atmospheric composition.
description: 24 pages, 10 figures. Accepted in ApJ
Modeling, Control, and Design of Two Different Systems
Creators: name: Ibrahim, Bahaa
Publisher: name: figshare
Year: 2020
Subjects: subject: Aerospace Engineering
subject: FOS: Mechanical engineering
subject: 90602 Control Systems, Robotics and Automation
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 91302 Automation and Control Engineering

description: This technical report aims to model two different systems. The modern
system is aircraft pitching control in state-space and design the aircraft pitch to desired
specifications to get the behavior and performance of the aircraft. To make this control
we have to do quite good mathematical modeling to the aircraft. As known, Motion of
aircraft described by three rotations, Rolling, Yawing, and Pitching, the Pitching
rotation as it is very important in control the whole aircraft and it can't be neglected.
We are going to control and stabilize the pitching rotation of the aircraft using some
assumptions to linearize the problem to be controllable and easy to complete the statespace modeling and time-domain solution of state equations using state-transition
matrix. Transferring state-space into transfer function to be used in the design of
pitching of aircraft using pole placement, observer design, and integral control
techniques. All these techniques we are going to apply them to The commercial system
which is the Oven system.
Consistency and Causality of Interconnected Nonsignaling Resources
Creators: name: Bierhorst, Peter
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper examines networks of $n$ measuring parties sharing $m$ nonsignaling resources that can be locally wired together: that is, each party follows a scheme to measure the resources in a cascaded fashion with inputs to later resources possibly depending on outputs of earlier-measured ones. A specific framework is provided for studying probability distributions arising in such networks, and this framework is used to directly prove some accepted, but often only implicitly invoked, facts: there is a uniquely determined and well-defined joint probability distribution for the outputs of all resources shared by the parties, and this joint distribution is nonsignaling. It is furthermore shown that is often sufficient to restrict consideration to only extremal nonsignaling resources when considering features and properties of such networks. Finally, the framework illustrates how the physical theory of nonsignaling boxes and local wirings is causal, supporting the applicability of the inflation technique to constrain such models.
 For an application, we probe the example of (3,2,2) inequalities that witness genuine three-party nonlocality according to the local-operations-shared-randomness definition, and show how all other examples can be derived from that of Mao et al. [Phys. Rev. Lett. 129:150401 (2022)]
description: 31 pages, 4 figures. Minor revisions in V3; close to published version
Enhancing Security and Privacy in Federated Learning using Low-Dimensional Update Representation and Proximity-Based Defense
Creators: name: Li, Wenjie
name: Fan, Kai
name: Zhang, Jingyuan
name: Li, Hui
name: Lim, Wei Yang Bryan
name: Yang, Qiang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Federated Learning (FL) is a promising privacy-preserving machine learning paradigm that allows data owners to collaboratively train models while keeping their data localized. Despite its potential, FL faces challenges related to the trustworthiness of both clients and servers, particularly against curious or malicious adversaries. In this paper, we introduce a novel framework named \underline{F}ederated \underline{L}earning with Low-Dimensional \underline{U}pdate \underline{R}epresentation and \underline{P}roximity-Based defense (FLURP), designed to address privacy preservation and resistance to Byzantine attacks in distributed learning environments. FLURP employs $\mathsf{LinfSample}$ method, enabling clients to compute the $l_{\infty}$ norm across sliding windows of updates, resulting in a Low-Dimensional Update Representation (LUR). Calculating the shared distance matrix among LURs, rather than updates, significantly reduces the overhead of Secure Multi-Party Computation (SMPC) by three orders of magnitude while effectively distinguishing between benign and poisoned updates. Additionally, FLURP integrates a privacy-preserving proximity-based defense mechanism utilizing optimized SMPC protocols to minimize communication rounds. Our experiments demonstrate FLURP's effectiveness in countering Byzantine adversaries with low communication and runtime overhead. FLURP offers a scalable framework for secure and reliable FL in distributed environments, facilitating its application in scenarios requiring robust data management and security.
description: 14 pages
Key Success Factors in Health-related Food Marketing: A Case Study Approach
Creators: name: Aschemann-Witzel, Jessica
name: Perez-Cueto, Federico J.A.
name: Niedzwiedzka, Barbara
name: Verbeke, Wim
name: Bech-Larsen, Tino
name: Aschemann-Witzel, Jessica
name: Perez-Cueto, Federico J.A.
name: Niedzwiedzka, Barbara
name: Verbeke, Wim
name: Bech-Larsen, Tino
Publisher: name: Unknown
Year: 2011
Subjects: subject: Health Economics and Policy
subject: Marketing
subject: FOS: Economics and business

description: Every now and then, astonishing success stories can be observed on the food market. Many of the recent examples make reference to health characteristics and arguments. In order to analyse the possibly underlying success factors, an empirical case study approach was chosen. 27 successful European Union food marketing cases were purposively sampled from the database of renowned marketing effectiveness awards as well as following a series of food market expert interviews. Success factors were analyzed in a two-step approach, first for each case and then in a case-by-case comparison structured with a card sorting method. Six groups of success factors emerged from the analysis and named "data and knowledge", "emotions", "endorsement", "media", "community" and "why and how". Several success factors appeared to be of specific importance for the issue of health characteristics and arguments. It is concluded that considering the applicability of these case derived success factors might be a recommendable way of improving food marketing campaigns, especially when referencing to health in the communication.
Development of the X-ray polarimeter using CMOS imager: polarization sensitivity of a $1.5~{\rm μm}$ pixel CMOS sensor
Creators: name: Iwata, Toshiya
name: Hagino, Kouichi
name: Odaka, Hirokazu
name: Tamba, Tsubasa
name: Ichihashi, Masahiro
name: Kato, Tatsuaki
name: Ishiwata, Kota
name: Kuramoto, Haruki
name: Matsuhashi, Hiroumi
name: Arai, Shota
name: Minami, Takahiro
name: Takashima, Satoshi
name: Bamba, Aya
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We are developing an imaging polarimeter by combining a fine-pixel CMOS image sensor with a coded aperture mask as part of the cipher project, aiming to achieve X-ray polarimetry in the energy range of $10$$\unicode{x2013}$$30~\mathrm{keV}$. A successful proof-of-concept experiment was conducted using a fine-pixel CMOS sensor with a $2.5~\mathrm{μm}$ pixel size. In this study, we conducted beam experiments to assess the modulation factor (MF) of the CMOS sensor with a $1.5~\mathrm{μm}$ pixel size manufactured by Canon and to determine if there was any improvement in the MF. The measured MF was $8.32\% \pm 0.34\%$ at $10~\mathrm{keV}$ and $16.10\% \pm 0.68\%$ at $22~\mathrm{keV}$, exceeding those of the $2.5~\mathrm{μm}$ sensor in the $6$$\unicode{x2013}$$22~\mathrm{keV}$ range. We also evaluated the quantum efficiency of the sensor, inferring a detection layer thickness of $2.67 \pm 0.48~{\rm μm}$. To develop a more sensitive polarimeter, a sensor with a thicker detection layer, smaller pixel size, and reduced thermal diffusion effect is desirable.
description: 18 pages, 8 figures, 5 tables, accepted for publication in NIM-A