cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phenomenology for an extra-dimension from gravitational waves propagation on a Kaluza-Klein space-time
Creators: name: Alesci, Emanuele
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the present work we analize the behavior of 5-dimensional gravitational waves propagating on a Kaluza-Klein background and we face separately the two cases in which respectively the waves are generated before and after the process of dimensional compactification. We show that if the waves are originated on a 5-d space-time which fulfills the principle of general relativity, then the process of compactification can not reduce the dynamics to the pure 4-dimensional scalar, vector and tensor degrees of freedom. In particular, while the electromagnetic waves evolve independently, the scalar and tensor fields couple to each other; this feature appears because, when the gauge conditions are splitted, the presence of the scalar ripple prevents that the 4-d gravitational waves are traceless. The phenomenological issue of this scheme consists of an anomalous relative amplitude of the two independent polarizations which characterize the 4-d gravitational waves. Such profile of polarization amplitudes, if detected, would outline the extra-dimension in a very reliable way, because a wave with non-zero trace can not arise from ordinary matter sources. We discuss the above mentioned phenomenon either in the case of a unit constant value of the background scalar component (when the geodesic deviation is treated with precise outputs), and assuming such background field as a dynamical degree (only qualitative conclusion are provided here, because the details of the polarization amplitudes depend on the choice of specific metric forms). Finally we perturb a real Kaluza-Klein theory showing that in this context, while the electromagnetic waves propagate independently, the 4-d gravitational waves preserve their ordinary structure, while the scalar plays for them the role of source.
description: 21 pages, 2 figures, to appear on Int. Journ. Mod. Phys. D
Atomistic simulation of PDADMAC/PSS oligoelectrolyte multilayers: overall comparison of tri- and tetra-layer systems
Creators: name: Sánchez, Pedro A.
name: Vögele, Martin
name: Smiatek, Jens
name: Qiao, Baofu
name: Sega, Marcello
name: Holm, Christian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: By employing large-scale molecular dynamics simulations of atomistically resolved oligoelectrolytes in aqueous solutions, we study in detail the first four layer-by-layer deposition cycles of an oligoelectrolyte multilayer made of poly(diallyl dimethyl ammonium chloride)/poly(styrene sulfonate sodium salt) (PDADMAC/PSS). The multilayers are grown on a silica substrate in 0.1M {NaCl} electrolyte solutions and the swollen structures are then subsequently exposed to varying added salt concentration. We investigated the microscopic properties of the films, analyzing in detail the differences between three- and four-layers systems. Our simulations provide insights on the early stages of growth of a multilayer, which are particularly challenging for experimental observations. We found a rather strong entanglement of the oligoelectrolytes, with a fuzzy layering of the film structure. The main charge compensation mechanism is for all cases intrinsic, whereas extrinsic compensation is relatively ehanced for the layer of the last deposition cycle. In addition, we quantified other fundamental observables of these systems, as the film thickness, water uptake, and overcharge fractions for each deposition layer.
Finite-Time Stability Under Denial of Service
Creators: name: Doostmohammadian, Mohammadreza
name: Meskin, Nader
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Finite-time stability of networked control systems under Denial of Service (DoS) attacks are investigated in this paper, where the communication between the plant and the controller is compromised at some time intervals. Toward this goal, first an event-triggered mechanism based on the variation rate of the Lyapunov function is proposed such that the closed-loop system remains finite-time stable (FTS) and at the same time, the amount data exchange in the network is reduced. Next, the vulnerability of the proposed event-triggered finite-time controller in the presence of DoS attacks are evaluated and sufficient conditions on the DoS duration and frequency are obtained to assure the finite-time stability of the closed-loop system in the presence of DoS attack where no assumption on the DoS attack in terms of following a certain probabilistic or a well-structured periodic model is considered. Finally, the efficiency of the proposed approach is demonstrated through a simulation study.
Análise dos fatores determinantes da viabilidade de implantação do contrato futuro de suínos vivos no Brasil
Creators: name: Santos, Adriana Helena Gama Dos
name: Aguiar, Danilo Rolim Dias De
name: Santos, Adriana Helena Gama Dos
name: Aguiar, Danilo Rolim Dias De
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Mercado futuro
subject: Suínos
subject: Inovação contratual

description: O objetivo deste estudo é analisar a viabilidade de utilização de um contrato futuro referenciado em suínos, no Brasil. O interesse decorre da importância da cadeia de suínos neste país, que, apesar de relevante, apresenta grande instabilidade, principalmente quando se avaliam os riscos de preços do produto. No entanto, a introdução de um novo contrato não é uma questão simples, visto que muitos contratos são lançados no mercado, mas tempos depois fracassam. Assim, o estudo do mercado e das características da commodity deve ser realizado antes da inovação contratual, para que os pontos positivos e possíveis pontos problemáticos sejam identificados. O modelo utilizado foi desenvolvido por Pennings e Leuthold (1999), que avaliaram as características micro e macro da tomada de decisão de uma inovação contratual. Avaliaram-se, principalmente, as características macro, sendo estudadas as variáveis: i) perecibilidade e possibilidade de a commodity ser estocada; ii) homogeneidade e capacidade de mensuração; iii) volatilidade de preço; iv) tamanho do mercado físico; v) grau de competição do mercado; vi) contratos à termo; e vii) competição com outros contratos. Os resultados permitem concluir, por um lado, que as variáveis ii), iv), v) e vi) podem ser os principais entraves a implantação de um contrato futuro referenciado em suínos vivos, no Brasil. Por outro, o mercado apresentou preços bastante voláteis e pequena possibilidade de utilizar contratos futuros alternativos, como o milho ou o boi gordo, pontos tidos como favoráveis ao processo de implantação de um contrato baseado na própria commodity.
Dynamic Behaviour of Connectionist Speech Recognition with Strong Latency Constraints
Creators: name: Salvi, Giampiero
Publisher: name: arXiv
Year: 2024
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: I.5.0; I.2.7; E.4

description: This paper describes the use of connectionist techniques in phonetic speech recognition with strong latency constraints. The constraints are imposed by the task of deriving the lip movements of a synthetic face in real time from the speech signal, by feeding the phonetic string into an articulatory synthesiser. Particular attention has been paid to analysing the interaction between the time evolution model learnt by the multi-layer perceptrons and the transition model imposed by the Viterbi decoder, in different latency conditions. Two experiments were conducted in which the time dependencies in the language model (LM) were controlled by a parameter. The results show a strong interaction between the three factors involved, namely the neural network topology, the length of time dependencies in the LM and the decoder latency.
Reply to Comment on Symbolic Calculation of Two-Center Overlap Integrals Over Slater-Type Orbitals
Creators: name: Gumus, Sedat
name: Ozdogan, Telhat
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The comments of Guseinov are critically analyzed. Contrary to his comments, it is pointed out that our formula for two-center overlap integrals over Slater type orbitals have been derived independently, not derived from the earlier works of Guseinov by changing the summation indices. Therefore, our algorithm is original, is not affected from possible instability problems and can be used in large scale calculations without loss of significant figures. Meanwhile, it should be stressed that his comment on the transformation of our formula into his formula proves the correctness of our algorithm and therefore can be regarded as a nice sound of science.
description: 1 page
Effect of Reconnection Probability on Cosmic (Super)string Network Density
Creators: name: Avgoustidis, A.
name: Shellard, E. P. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We perform numerical simulations of cosmic string evolution with intercommuting probability $P$ in the range $5\times 10^{-3}\le P\le 1$, both in the matter and radiation eras, using a modified version of the Allen-Shellard code. We find that the dependence of the scaling density on $P$ is significantly different than the suggested $ρ\propto P^{-1}$ form. In particular, for probabilities greater than $P\simeq 0.1$, $ρ(1/P)$ is approximately flat, but for $P$ less than this value it is well-fitted by a power-law with exponent $0.6^{+0.15}_{-0.12}$. This shows that the enhancement of string densities due to a small intercommuting probability is much less prominent than initially anticipated. We interpret the flat part of $ρ(1/P)$ in terms of multiple opportunities for string reconnections during one crossing time, due to small-scale wiggles. We also propose a two-scale model incorporating the key physical mechanisms, which satisfactorily fits our results over the whole range of $P$ covered by the simulations.
description: 6 pages, 4 figures
The influence of vibronic coupling on the shape of transport characteristics in inelastic tunneling through molecules
Creators: name: Walczak, Kamil
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Here we present theoretical studies of the effect of vibronic coupling on nonlinear transport characteristics (current-voltage and conductance-voltage) in molecular electronic devices. Considered device is composed of molecular quantum dot (with discrete energy levels) weakly connected to metallic electrodes (treated within the wide-band approximation), where molecular vibrations are modeled as dispersionless phonon excitations. Nonperturbative computational scheme, used in this work, is based on the Green's function theory within the framework of mapping technique (GFT-MT) which transforms the many-body electron-phonon interaction problem into a one-body multi-channel single-electron scattering problem. In particular, it is shown that quantum coherent transport of virtual polarons through the molecule can be a dominant factor justifying some well-known discrepancies between theoretical calculations and experimental results.
description: 10 pages, 4 figures
Evidence of a simple dark sector from XENON1T excess
Creators: name: Chiang, Cheng-Wei
name: Lu, Bo-Qiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We propose that the nearly massless dark photons produced from the annihilation of keV dark fermions in the Galaxy can induce the excess of electron recoil events recently observed in the XENON1T experiment. The minimal model for this is the extension of a $U(1)_{X}$ gauge symmetry, under which the dark photon couples to both dark and visible matter currents. We find that the best-fit parameters of the dark sector are compatible with the most stringent constraints from stellar cooling. We also show that in the freeze-out scenario, the dark fermions can explain the anomaly while contributing $\gtrsim 1\%$ of the DM relic density.
description: 5 pages, 3 figures. v2: minor changes to match the published version
Study of dynamical supersymmetry breaking for the two dimensional lattice Wess-Zumino model
Creators: name: Beccaria, M.
name: De Angelis, G. F.
name: Campostrini, M.
name: Feo, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A new approach to the study of the transition point in a class of two dimensional Wess-Zumino models is presented. The method is based on the calculation of rigorous lower bounds on the ground state energy density in the infinite lattice limit. Such bounds are useful in the discussion of supersymmetry phase transition. The transition point is then determined and compared with recent results based on large-scale Green Function Monte Carlo simulations with good agreement.
description: 4 pages, 1 figure, Talk presented at Quark Confinement and the Hadron Spectrum VI, Villasimius, Sardinia, Italy, September 21-25, 2004
Uma análise do setor de distribuição de flores e plantas ornamentais no estado do Rio de Janeiro
Creators: name: Lirio, Viviani Silva
name: Silva, Carlos Arthur Barbosa Da
name: Reis, Bricio Dos Santos
name: Aguiar, Danilo Rolim Dias De
name: Stringheta, Angela Cristina
name: Lirio, Viviani Silva
name: Silva, Carlos Arthur Barbosa Da
name: Reis, Bricio Dos Santos
name: Aguiar, Danilo Rolim Dias De
name: Stringheta, Angela Cristina
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Floricultura
subject: Cadeias produtivas
subject: Rio de Janeiro

description: Uma das principais características da produção de flores e plantas ornamentais é que esta constitui atividade típica de pequenos produtores. Embora a floricultura brasileira venha se expandindo em áreas menos tradicionais como o Nordeste do país, a maior parte da produção ainda se concentra nas regiões Sul e Sudeste, e os dados sobre a distribuição de flores no Brasil indicam o estado de São Paulo como principal centro da produção nacional. O estado do Rio de Janeiro tem-se destacado, nesse contexto, como região potencial de expansão da produção e comercialização de flores e plantas ornamentais, com destaque para as variedades tropicais, de crescente aceitação internacional.Este trabalho analisa o segmento de distribuição de flores e plantas ornamentais no Rio de Janeiro, tendo por referência conceitual o enfoque sistêmico de produto (Commodity Systems Approach). Para consecução da pesquisa, foram realizados amplos levantamentos secundário e primário junto aos principais agentes que atuam no segmento de distribuição de flores no Rio de Janeiro. Os resultados obtidos indicam que os principais entraves ao desempenho do setor estão relacionados com as relações de mercado vigentes e com os aspectos gerenciais.
A New Scintillator Tile/Fiber Preshower Detector for the CDF Central Calorimeter
Creators: name: Gallinaro, Michele
Publisher: name: arXiv
Year: 2004
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A detector designed to measure early particle showers has been installed in front of the central CDF calorimeter at the Tevatron. This new preshower detector is based on scintillator tiles coupled to wavelength-shifting fibers read out by multi-anode photomultipliers and has a total of 3,072 readout channels. The replacement of the old gas detector was required due to an expected increase in instantaneous luminosity of the Tevatron collider in the next few years. Calorimeter coverage, jet energy resolution, and electron and photon identification are among the expected improvements. The final detector design, together with the R$&$D studies that led to the choice of scintillator and fiber, mechanical assembly, and quality control are presented. The detector was installed in the fall 2004 Tevatron shutdown and started collecting colliding beam data by the end of the same year. First measurements indicate a light yield of 12 photoelectrons/MIP, a more than two-fold increase over the design goals.
description: 5 pages, 10 figures (changes are minor; this is the final version published in IEEE-Trans.Nucl.Sci.)
On some generalization of the bicyclic semigroup: the topological version
Creators: name: Cencelj, Matija
name: Gutik, Oleg
name: Repovš, Dušan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Group Theory (math.GR)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: Primary 22A15, 20M20, Secondary 20M05, 54C25, 54E52

description: We show that every Hausdorff Baire topology $τ$ on $\mathcal{C}=\langle a,b\mid a^2b=a, ab^2=b\rangle$ such that $(\mathcal{C},τ)$ is a semitopological semigroup is discrete and we construct a nondiscrete Hausdorff semigroup topology on $\mathcal{C}$. We also discuss the closure of a semigroup $\mathcal{C}$ in a semitopological semigroup and prove that $\mathcal{C}$ does not embed into a topological semigroup with the countably compact square.
description: 12 pages
On the Boolean Closure of Deterministic Top-Down Tree Automata
Creators: name: Löding, Christof
name: Thomas, Wolfgang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences
subject: F.4.3; F.1.1

description: The class of Boolean combinations of tree languages recognized by deterministic top-down tree automata (also known as deterministic root-to-frontier automata) is studied. The problem of determining for a given regular tree language whether it belongs to this class is open. We provide some progress by two results: First, a characterization of this class by a natural extension of deterministic top-down tree automata is presented, and as an application we obtain a convenient method to show that certain regular tree languages are outside this class. In the second result, it is shown that, for fixed $k$, it is decidable whether a regular tree language is a Boolean combination of $k$ tree languages recognized by deterministic top-down tree automata.
description: This is a preprint of a paper published in a special issue dedicated to the memory of Magnus Steinby in the International Journal of Foundations of Computer Science. Compared to the published journal version, reference [8] has been added in a comment at the end of the introduction
Automated Security Findings Management: A Case Study in Industrial DevOps
Creators: name: Voggenreiter, Markus
name: Angermeir, Florian
name: Moyón, Fabiola
name: Schöpp, Ulrich
name: Bonvin, Pierre
Publisher: name: arXiv
Year: 2024
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In recent years, DevOps, the unification of development and operation workflows, has become a trend for the industrial software development lifecycle. Security activities turned into an essential field of application for DevOps principles as they are a fundamental part of secure software development in the industry. A common practice arising from this trend is the automation of security tests that analyze a software product from several perspectives. To effectively improve the security of the analyzed product, the identified security findings must be managed and looped back to the project team for stakeholders to take action. This management must cope with several challenges ranging from low data quality to a consistent prioritization of findings while following DevOps aims. To manage security findings with the same efficiency as other activities in DevOps projects, a methodology for the management of industrial security findings minding DevOps principles is essential.
 In this paper, we propose a methodology for the management of security findings in industrial DevOps projects, summarizing our research in this domain and presenting the resulting artifact. As an instance of the methodology, we developed the Security Flama, a semantic knowledge base for the automated management of security findings. To analyze the impact of our methodology on industrial practice, we performed a case study on two DevOps projects of a multinational industrial enterprise. The results emphasize the importance of using such an automated methodology in industrial DevOps projects, confirm our approach's usefulness and positive impact on the studied projects, and identify the communication strategy as a crucial factor for usability in practice.
Collisional picture of quantum optics with giant emitters
Creators: name: Cilluffo, Dario
name: Carollo, Angelo
name: Lorenzo, Salvatore
name: Gross, Jonathan A.
name: Palma, G. Massimo
name: Ciccarello, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The effective description of the weak interaction between an emitter and a bosonic field as a sequence of two-body collisions provides a simple intuitive picture compared to traditional quantum optics methods as well as an effective calculation tool of the joint emitter-field dynamics. Here, this collisional approach is extended to many emitters (atoms or resonators), each generally interacting with the field at many coupling points ("giant" emitter). In the regime of negligible delays, the unitary describing each collision in particular features a contribution of a chiral origin resulting in an effective Hamiltonian. The picture is applied to derive a Lindblad master equation (ME) of a set of giant atoms coupled to a (generally chiral) waveguide field in an arbitrary white-noise Gaussian state, which condenses into a single equation and extends a variety of quantum optics and waveguide-QED MEs. The effective Hamiltonian and jump operators corresponding to a selected photodetection scheme are also worked out.
description: 21 pages, 7 figures
Extending the solutions and the equations of quantum gravity past the big bang singularity
Creators: name: Gerhardt, Claus
Publisher: name: arXiv
Year: 2025
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In [8] we recently proved that in our model of quantum gravity the solutions to the quantized version of the full Einstein equations or to the Wheeler-DeWitt equation could be expressed as products of spatial and temporal eigenfunctions, or eigendistributions, of self-adjoint operators acting in corresponding separable Hilbert spaces. Moreover, near the big bang singularity we derived sharp asymptotic estimates for the temporal eigenfunctions. In this paper we show that, by using these estimates, there exists a complete sequence of unitarily equivalent eigenfunctions which can be extended past the singularity by even or odd mirroring as sufficiently smooth functions such that the extended functions are solutions of the appropriately extended equations valid in $\R[]$ in the classical sense. We also use this phenomenon to explain the missing antimatter.
description: 35 pages
Ground State of Quantum Jahn-Teller Model: Selftrapping vs Correlated Phonon-assisted Tunneling
Creators: name: Majernikova, E.
name: Shpyrko, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ground state of the quantum Jahn-Teller model with broken rotational symmetry was investigated by the variational approach in two cases: a lattice and a local ones. Both cases differ by the way of accounting for the nonlinearity hidden in the reflection-symmetric Hamiltonian. In spite of that the ground state energy in both cases shows the same features: there appear two regions of model parameters governing the ground state: the region of dominating selftrapping modified by the quantum effects and the region of dominating phonon-assisted tunneling (antiselftrapping). In the local case (i) the effect of quantum fluctuations and anharmonicity due to the two-mode correlations is up to two orders larger than contributions due to the reflection effects of two-center wave function; (ii) the variational results for the ground state energy were compared with exact numerical results. The coincidence is the better the more far away from the transition region at the E$\otimes$e symmetry where the variational approach fails.
description: 18 pages, 7 figures, published in Adv.in Quantum Chemistry
Methodology for scheduling pre-board screening staff at the Vancouver International Airport
Creators: name: Parkinson, Anita
Publisher: name: University of British Columbia
Year: 2009

description: A scheduling methodology has been developed for the staffing of pre-board screening at the Vancouver International Airport. Pre-board screening is the process of x-raying hand baggage and checking passengers to ensure no prohibited items are carried onto an aircraft. At the Vancouver International Airport there are four screening locations and the demand fluctuates differently at each location. Given a day's departing flight schedule, for each 10-minute interval over the day, the methodology forecasts the passenger demand at each of the four pre-board screening locations, determines optimal staffing level to meet the service criteria of less than 10 percent of passengers spending more than 10 minutes in the system, then determines a staff shift schedule that will ensure there are sufficient staff in the airport to meet the minimum numbers. The methodology has been implemented using Excel spreadsheets and solves quickly. In the forecasting methodology, a distribution is applied to each departing flight to distribute the departing passengers over the time period preceding the departure time. The results agree well with available data. The scheduling period is divided into 10-minute intervals and for the passenger demand in each interval at each screening location, a staffing level is determined using queuing theory. Finally, a shift schedule is developed that will cover the aggregated demand of the four screening locations using linear programming. It is possible for screening agents to move from one screening location to another during the shift making satisfying the aggregate demand feasible.
Empresas transnacionais e internalização de atividades tecnológicas no complexo agroindustrial brasileiro
Creators: name: Nascimento, Rosana Do Carmo
name: Silva, Jose Maria Alves Da
name: Nascimento, Rosana Do Carmo
name: Silva, Jose Maria Alves Da
Publisher: name: Unknown
Year: 2003
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Tecnologia
subject: Complexo agroindustrial
subject: Empresas transnacionais
subject: Patentes

description: Esse trabalho objetiva investigar a contribuição das empresas transnacionais no processo de inovação tecnológica do Complexo Agroindustrial brasileiro. Para isso, construiu-se um índice de internalização relativa da atividade tecnológica (IRAT), a partir de informações de depósitos de patentes (invenção e modelo de utilidade) e registros de desenhos (desenhos e modelos industriais) no INPI. Foram analisados depósitos de 229 empresas, sendo 116 estrangeiras e 113 nacionais, agrupadas por setores específicos e segmentos do CAI. Observou-se elevada concentração de patentes nas empresas estrangeiras e baixa internalização tecnológica no Complexo, para as patentes de invenção (0,061), e maior internalização nos modelos de utilidade e registros (0,71). Considerando-se que os modelos de utilidade e registros têm teor tecnológico mais baixo, concluiu-se que é pouco significativa a contribuição das empresas transnacionais para a inovação tecnológica no CAI. Verificou-se maior internalização na agricultura do que no segmento a sua montante, que é mais sofisticado e intensivo no uso de tecnologias. Observou-se, também, que os setores de maior concentração de empresas estrangeiras apresentaram menores índices de internalização, e os de pequena participação, maiores índices de internalização tecnológica. Assim, conclui-se que a presença de empresas estrangeiras nos setores e segmentos do CAI está inversamente relacionada ao índice de internalização da atividade tecnológica.
Suspensions of magnetic nanogels at zero field: equilibrium structural properties
Creators: name: Novikau, Ivan S.
name: Minina, Elena S.
name: Sánchez, Pedro A.
name: Kantorovich, Sofia S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic nanogels represent a cutting edge of magnetic soft matter research due to their numerous potential applications. Here, using Langevin dynamics simulations, we analyse the influence of magnetic nanogel concentration and embedded magnetic particle interactions on the self-assembly of magnetic nanogels at zero field. For this, we calculated radial distribution functions and structure factors for nanogels and magnetic particles within them. We found that, in comparison to suspensions of free magnetic nanoparticles, where the self-assembly is already observed if the interparticle interaction strength exceeds the thermal fluctuations by approximately a factor of three, self-assembly of magnetic nanogels only takes place by increasing such ratio above six. This magnetic nanogel self-assembly is realised by means of favourable close contacts between magnetic nanoparticles from different nanogels. It turns out that for high values of interparticle interactions, corresponding to the formation of internal rings in isolated nanogels, in their suspensions larger magnetic particle clusters with lower elastic penalty can be formed by involving different nanogels. Finally, we show that when the self-assembly of these nanogels takes place, it has a drastic effect on the structural properties even if the volume fraction of magnetic nanoparticles is low.
description: International Conference on Magnetic Fluids - ICMF 2019
A systematic analysis of X-ray afterglows of gamma-ray burst observed by XMM-Newton
Creators: name: Gendre, B.
name: Piro, L.
name: De Pasquale, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This work is part of a systematic re-analysis program of all the data of Gamma-Ray Burst (GRB) X-ray afterglows observed so far, in order to constrain the GRB models. We present here a systematic analysis of those afterglows observed by XMM-Newton between January 2000 and March 2004. This dataset includes GRB 011211 and GRB 030329. We have obtained spectra, light curves and colors for these afterglows. In this paper we focus on the continuum spectral and temporal behavior. We compare these values with the theoretical ones expected from the fireball model. We derive constraints about the burst environment (absorption, density profile) and put constraints on their beaming angle.
description: 7 pages, 2 figures, COSPAR proceeding accepted for publication in Advances in Space Research
Absolute neutrino mass as the missing link to the dark sector
Creators: name: de Boer, T.
name: Klasen, M.
name: Rodenbeck, C.
name: Zeinstra, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: With the KATRIN experiment, the determination of the absolute neutrino mass scale down to cosmologically favored values has come into reach. We show that this measurement provides the missing link between the Standard Model and the dark sector in scotogenic models, where the suppression of the neutrino masses is economically explained by their only indirect coupling to the Higgs field. We determine the linear relation between the electron neutrino mass and the scalar coupling $λ_5$ associated with the dark neutral scalar mass splitting to be $λ_5=3.1\times10^{-9}\ m_{ν_e}/$eV. This relation then induces correlations among the DM and new scalar masses and their Yukawa couplings. Together, KATRIN and future lepton flavor violation experiments can then probe the fermion DM parameter space, irrespective of the neutrino mass hierarchy and CP phase.
description: 5 pages, 5 figures, published version
As exportações brasileiras: um enfoque de portfólio eficiente
Creators: name: Oliveira, Gilca Garcia De
name: Carvalho, Fatima Marilia Andrade De
name: Oliveira, Gilca Garcia De
name: Carvalho, Fatima Marilia Andrade De
Publisher: name: Unknown
Year: 2003
Subjects: subject: International Relations/Trade
subject: Exportações
subject: Markowitz
subject: Portfólio
subject: Risco
subject: Mercosul

description: A seleção de uma pauta eficiente de exportação permite ao país melhor adequação ao planejamento de médio e longo prazo, com maior estabilidade e menores riscos, o que dá sustentabilidade ao desenvolvimento. O modelo de portfólio, de Markowitz, permite avaliar a pauta de exportação de um país por uma análise de retorno e risco, possibilitando a seleção de uma carteira ótima. Nesse contexto, foram avaliadas as pautas de exportação do Brasil em 6-dígitos da Nomenclatura Comum do Mercosul. Verificou-se que a pauta nacional foi se diversificando com participações cada vez mais eqüitativas dos produtos componentes. As seções Matérias Têxteis, Indústrias Alimentares e Metais Comuns e Suas Obras foram selecionadas dentre as mais importantes, em todos os três períodos considerados na análise, o que indica o potencial de estabilidade de seus produtos na conformação estrutural da pauta de exportações do país, observando-se que esses produtos são aqueles tradicionalmente exportados pelo país. O modelo é um instrumental na tomada de decisões, no caso de produtos exportáveis, em que está em jogo a estrutura produtiva e de comércio de um país, a qual envolva produtores, trabalhadores e comerciantes, ou seja, tanto pessoas quanto recursos produtivos no processo de produção e de exportação.
Translation and the problematics of textual integrity : a comparative analysis of two English renderings of Fyodor Dostoevsky’s Dnevnik pisatelia
Creators: name: Danowski, Grzegorz
Publisher: name: University of British Columbia
Year: 2009

description: This paper is a comparative analysis of selections from the two English translations of Fyodor Dostoevsky's “Дневник писателя (1873-1881)” — The Diary of a Writer (Boris Brasol, 1949) and A Writer's Diary (Kenneth Lantz, 1993). The selections include the short stories "The Meek One" and "Bobok," the fictional epistle "A Half-Letter from a 'Certain Person,'" the semifictional sketch "A Hundred-Year-Old Woman," as well as two feullietons: "What Does the Word 'Striutsky' Mean" and "The History of the Verb 'Stushevatsia.'" While elements of reader response theory and recent translation studies scholarship provided a basic theoretical framework for this discussion, the latter shaped itself mainly as a comparison of the three primary texts: the Russian and the two English translations. This approach made it possible to amass a considerable database of textual detail upon which to draw for pronouncements regarding the difficulties that may potentially accompany translation from Russian into English in general, as well as the difficulties that seem to originate in the peculiarities of Dostoevsky's style. Although an effort has been made throughout to avoid a purely qualitative comparison of the two translations, this analysis frequently favours Lantz's translation as more accurate and flexible in its approach. Rather than constituting the ultimate object of the present study, whenever made, qualitative judgements provide points of departure for inquiry into the nature of the translator's task—one that often involves the ability and willingness to accept the untranslatable. By considering some parts of “Дневник” in relation to their English translations, this paper demonstrates that the most important aspect of the work is its "one-ness." Although clearly a combination of genres, it is also a separate genre in its own right. As this analysis proves, the formal paradox inherent in the Diary's very design has until recently puzzled, discouraged, and challenged both literary critics and translators. Together with Brasol's and Lantz's translations, this paper is offered as an effort aimed at promoting a better understanding of the Diary within the context of Dostoevsky's other literary and philosophical output.
Additional file 2 of Phosphatidic acid-dependent localization and basal de-phosphorylation of RA-GEFs regulate lymphocyte trafficking
Creators: name: Ishihara, Sayaka
name: Sato, Tsuyoshi
name: Guangwei Du
name: Guardavaccaro, Daniele
name: Nakajima, Akihiko
name: Sawai, Satoshi
name: Kataoka, Tohru
name: Katagiri, Koko
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Plant Biology

description: Additional file 2: Figure S2. Gradient formation in the chemotaxis chamber. (A) A chamber overview. The chamber consists of a block of molded PDMS bonded to a glass-bottom dish that together form a 2 mm long linear channel. The height and the width of the channel are 50 μm and 250 μm, respectively. One side of the channel is connected to a cell-loading well, and the other side is connected to a chemoattractant circular reservoir of a diameter 2 mm. The reservoir is connected to an inlet for chemoattractant loading though a 200 μm-wide channel. The concentration gradient is formed by passive diffusion (green) by closing the inlet with a plug. Scale bar, 1 μm. (B) Snapshots of the concentration gradient in the chemotaxis chamber where a green food coloring was loaded for demonstration. Scale bar, 2 mm. (C) Evaluation of the gradient profile; PBS containing 10 μM fluorescein was loaded for visualization. The time-course of the fluorescent intensity profiles during the initial transient (left panel; immediately after loading) and after the initial transient (right panel; 30 min after loading). The mean fluorescence intensities of a 250 μm wide area as a function of the distance from the border between the channel and the cell-loading well; data was plotted every 5 min (left panel) and 10 min (right panel), respectively. (D) The time-course of the fluorescent intensity. The fluorescent intensity at 0 μm (dark blue), 500 μm (blue), 1000 μm (cyan), 1500 μm (yellow), and 1800 μm (red) from the cell-loading well during the initial transient (left panel; immediately after loading) and chemotaxis assay (right panel; 30 min after loading).
A regularity criterion to the 3d Boussinesq equations
Creators: name: Alghamdi, A. M.
name: Omrane, I. Ben
name: Gala, S.
name: Ragusa, M. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35 (primary), 76D03 (secondary)

description: The paper deals with the regularity criterion for the weak solutions to the 3D Boussinesq equations in terms of the partial derivatives in Besov spaces. It is proved that the weak solution $(u,θ)$ becomes regular provided that $(\nabla_{h}u,\nabla_{h}θ)\in L^{\frac{8}{3}}(0,T;\dot{B}_{\infty ,\infty}^{-1}(\mathbb{R}^{3}))$ Our results improve and extend the well-known results by Fang-Qian for the Navier-Stokes equations.
description: Siberian Electronic Mathematical Reports
Energy in Reboucas-Tiomno-Korotkii-Obukhov and Godel-type Space-times in Bergmann-Thomson's Formulations
Creators: name: Aydogdu, Oktay
name: Salti, Mustafa
name: Korunur, Murat
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper has been removed by arXiv administrators because it overlaps gr-qc/0303009, hep-th/0405047, gr-qc/0412120, and others. This paper also has excessive overlap with the following papers also written by the authors or their collaborators: gr-qc/0607119, gr-qc/0607103, gr-qc/0607115, and others.
description: This submission has been withdrawn by arXiv administrators due to inappropriate text reuse from external sources
Proposta metodológica para analisar efeitos de barreiras não-tarifárias sobre exportações - o caso da carne bovina brasileira
Creators: name: Miranda, Silvia Helena Galvao De
name: Barros, Geraldo Sant'Ana De Camargo
name: Miranda, Silvia Helena Galvao De
name: Barros, Geraldo Sant'Ana De Camargo
Publisher: name: Unknown
Year: 2003
Subjects: subject: International Relations/Trade
subject: Barreira sanitária
subject: Carne bovina
subject: Exportação
subject: Modelo de intervenção

description: O objetivo deste trabalho é propor uma metodologia que permita medir os efeitos de barreiras não-tarifárias sobre o desempenho exportador de um setor específico. Para testar a metodologia, foi analisada a ocorrência de eventos/barreiras sanitárias sobre nas exportações brasileiras de carne bovina (cortes especiais), destinadas à União Européia. A metodologia compreende a estimação de um modelo econométrico para vendas externas associado a um modelo de intervenção. O período analisado compreendeu janeiro de 1992 a dezembro de 2000. A maior parte das variações no volume e no preço de exportação foi explicada pelas variáveis selecionadas (taxa de câmbio, preço do boi gordo, renda do Brasil, preço dos concorrentes, entre outras). Os resultados apontam efeito significativo da intervenção, referente ao mês de março de 1995, sobre os preços de exportação dessa carne, o qual pode estar relacionado com a proibição das importações européias originadas de São Paulo e Minas Gerais, naquele período. De modo geral, as intervenções nos eventos sanitários não foram significativas, e alguns resultados não foram conclusivos.
Additional file 3 of Phosphatidic acid-dependent localization and basal de-phosphorylation of RA-GEFs regulate lymphocyte trafficking
Creators: name: Ishihara, Sayaka
name: Sato, Tsuyoshi
name: Guangwei Du
name: Guardavaccaro, Daniele
name: Nakajima, Akihiko
name: Sawai, Satoshi
name: Kataoka, Tohru
name: Katagiri, Koko
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Plant Biology

description: Additional file 3: Figure S3. Localization of PA-dependent Rap1-GTP in the front membrane during cell migration. (A) (Top left) We measured the ratios of Ral-GDS (red) in the cytoplasm, plasma membrane and PASS (green)-concentrated region of plasma membrane (white rectangular) in unstimulated and CXCL12-stimulated cells. (right) The graph shows ratios of Ral-GDS localized in each region (cytoplasm, plasma membrane or PASS-concentrated membrane). (Bottom left) We measured the ratios of Spa1 (green) in the cytoplasm, plasma membrane and Ral-GDS (red)-concentrated region of plasma membrane (white rectangular) in unstimulated and CXCL12-stimulated cells. (right) The graph shows ratios of Spa1 localized in each region. (B) (Left) Co-localization of PASS-GFP and Ral-GDS-RBD-mCherry in BAF cells after CXCL12 stimulation in the presence of dasatinib is shown. (Right) The ratios of Ral-GDS localized in the cytoplasm, plasma membrane and PASS-concentrated region of plasma membrane were measured in the presence of dasatinib. The graph shows percentages of cells showing that more than 50% of Ral-GDS was localized in each region (n = 30). (C) (Left upper) Displacement of scramble or C3G knockdown cells were measured on ICAM-1 with or without CXCL12 (n = 30). (lower) Representative tracks of scramble or C3G KD cells are shown. Each line represents a single-cell track. (Right upper) Co-localization of PASS-GFP and Ral-GDS-RBD-mCherry in C3G KD cells after CXCL12 stimulation is shown. (lower) The ratios of Ral-GDS localized in the cytoplasm, plasma membrane and PASS-concentrated region of plasma membrane were measured. The graph shows percentages of cells showing that more than 50% of Ral-GDS was localized in each region (n = 30). (D) (Left) Immunoblots with anti-C3G of cell lysates from scramble or C3G KD BAF cells. Actin is a loading control. (Right) Scramble and C3G KD cells were stimulated with CXCL12 at the indicated times, and subjected to the pull-down assay. Bound Rap1 (Rap1-GTP) and total Rap1 were detected with anti-Rap1. Each bar graph represents the means ±SEM. Scale bar, 5 μm.
Universal flow equations and chaos bound saturation in 2d dilaton gravity
Creators: name: Grumiller, Daniel
name: McNees, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that several features of the Jackiw-Teitelboim model are in fact universal properties of two-dimensional Maxwell-dilaton gravity theories with a broad class of asymptotics. These theories satisfy a flow equation with the structure of a dimensionally reduced TTbar deformation, and exhibit chaotic behavior signaled by a maximal Lyapunov exponent. One consequence of our results is a no-go theorem for smooth flows from an asymptotically AdS2 region to a de Sitter fixed point.
description: 21pp, 2figs, v2: added remarks in sections 4.3 and 6 and two refs, v3: added final paragraph in conclusions
Posicionamento estratégico nas negociações da ALCA, usando o conceito de proteção efetiva na montagem da oferta tarifária brasileira
Creators: name: Lopes, Mauro De Rezende
name: Lopes, Mauro De Rezende
Publisher: name: Unknown
Year: 2003
Subjects: subject: International Relations/Trade
subject: Proteção efetiva
subject: ALCA
subject: Tarifas
subject: Competitividade

description: O Brasil joga a sua capacidade de exportar e o futuro de sua inserção “competitiva” no mundo em três negociações-chave: OMC, ALCA e Mercoeuro. Tem esquecido de posicionar-se estrategicamente para fortalecer sua competitividade no curto, médio e longo prazo. A competitividade do setor agropecuário, entre outros fatores, depende do seu nível de proteção efetiva, isto é, a proteção do produto final depende de um nível compatível com a proteção aos insumos. Este estudo analisa uma parte da proposta de ofertas tarifárias brasileiras, no âmbito da ALCA, tendo como argumento principal os níveis de proteção efetiva. A primeira parte trata da proteção conferida aos insumos, máquinas e equipamentos usados na agropecuária, diante da proteção dos produtos agropecuários finais, e a análise é feita com a Tarifa Externa Comum (TEC). A segunda trata dos níveis de proteção outorgados a máquinas, equipamentos e componentes industriais da indústria de alimentos. O estudo mostra a dificuldade, no Brasil, de se conduzirem negociações com os setores industriais que ofertam insumos ou fornecem máquinas às agroindústrias brasileiras.