pinecone/core-2020-05-10-deduplication huggingface dataset:
Dynamics of counterpropagating waves in parametrically forced, large aspect ratio, nearly conservative systems with nonzero detuning

The dynamics of parametrically driven, slowly varying counterpropagating wave trains in nearly conservative systems are considered. The system is assumed to be invariant under reflection and translations in one direction, and periodic boundary conditions with period L are imposed, with L large but not too large in order that the effect of detuning be significant. The dynamics near the minima of the resulting resonance tongues are described by a system of coupled nonlocal Schrödinger equations with damping and parametric forcing. Elsewhere the long time behavior of the system is described by a damped complex Duffing equation with real coefficients, whose solutions relax to spatially uniform standing waves. Near the bicritical points where two adjacent resonance tongues intersect a pair of coupled damped complex Duffing equations captures the properties of both pure and mixed modes, and of the periodic solutions resulting from a Hopf bifurcation on the branch of mixed modes. As an application, we consider a Faraday system in an annulus in which a pair of counterpropagating surface gravity-capillary waves are excited parametrically by vertical vibration of the container, including the mean flow driven by time-averaged Reynolds stresses due to oscillatory viscous boundary layers along the bottom and the free surface. This mean flow is shown to have a large effect near the bicritical point, where the mean flow changes the dynamics of the system both quantitatively and qualitatively. In particular, inclusion of the mean flow permits Hopf bifurcations from the branches of pure standing waves, and parity-breaking bifurcations from mixed modes
FX Smile in the Heston Model

The Heston model stands out from the class of stochastic volatility (SV) models mainly for two reasons. Firstly, the process for the volatility is non-negative and mean-reverting, which is what we observe in the markets. Secondly, there exists a fast and easily implemented semi-analytical solution for European options. In this article we adapt the original work of Heston (1993) to a foreign exchange (FX) setting. We discuss the computational aspects of using the semi-analytical formulas, performing Monte Carlo simulations, checking the Feller condition, and option pricing with FFT. In an empirical study we show that the smile of vanilla options can be reproduced by suitably calibrating three out of five model parameters.
Toward proactive (eco)design process: modeling information transformations among designers activities

The growing number of tools and methods for environmental impact analysis shows the variety of contexts covered by ecodesign. As ecodesign tools are evolving rapidly and manipulating different data, environmental engineers are facing some difficulties to share data efficiently with the current product designers tools. To support this data exchange among software, the capacity of tools to interoperate has been widely improved over the last ten years by software integrations. However, this paper argues that the lack of dynamism and flexibility of those solutions cannot fully face the challenge of designing ecoeffective products. Therefore, this paper proposes a three-step method to build dynamic information exchanges between environmental engineers and product designers activities involved along the design process. This proposal can be adapted to the various ecodesign contexts encountered during the design process. It also gives the capacity to the environmental engineer to use any available information produced by other designers and to give them back an adapted answer to reiterate their choices. In this paper, the proposal has been tested on an industrial case study. The results are used to discuss the benefits of developing such a method in the industry to build a constant proactivity along the design process between the environmental engineer and product designers
Photocatalytic degradation of chlorophenols using Ru(bpy) 32+ /S2O 82-

Abstract  Advanced oxidation processes, such as photocatalysed oxidation, provide an important route for degradation of wastes. In this study, the lowest excited state (3MLCT) of Ru(bpy)32+ is used to break down chlorophenol pollutant molecules to harmless products. This has the advantage of using visible light and a short-lived catalytically active species. Photolysis of deaerated aqueous solutions of a variety of mono- and poly-substituted chlorophenols has been followed in the presence of Ru(bpy)32+/S2O82- with near visible light (? &gt; 350 nm) by UV/visible absorption spectroscopy, luminescence, potentiometry, NMR and HPLC techniques. Upon irradiation, a decrease is observed in the chlorophenol concentration, accompanied by the formation of Cl-, H+ and SO42- ions as the main inorganic products. Benzoquinone, phenol, dihydroxybenzenes and chlorinated compounds were the dominant organic products. As the ruthenium(II) complex is regenerated in the reaction, the scheme corresponds to an overall catalytic process. The kinetics of the rapid chlorophenol photodechlorination has been studied, and are described quite well by pseudo-first order behaviour. Further studies on this were made by following Cl- release with respect to the initial Ru(bpy)32+ and S2O82- concentrations. A comparison is presented of the photodechlorination reactivity of the mono and polychlorophenols studied at acidic and alkaline pH.http://dx.doi.org/10.1007/s10311-007-0096-
Conformational study of arbutin by quantum chemical calculations and multivariate analysis

A conformational study of the molecule of arbutin (4-hydroxyphenyl-β-d-glucopyranoside) has been undertaken. The molecule is composed by a glucopyranoside moiety bound to a phenol ring. It has eight conformationally relevant dihedral angles, five of them related with the orientation of the hydroxyl groups and the remaining three taking part in the skeleton of the molecule. A systematic search on the conformational space of arbutin was performed using molecular orbital methods, followed by the identification of structural similarities between the different conformers, using multivariate analyses. This approach allowed the grouping of conformers according to their structural affinity and the establishment of correlations between their structures and several properties. Intramolecular interactions involving OH groups were also investigated and correlations between spectroscopic, structural and thermodynamic properties established. The developed strategy might be useful to investigate the structure and structure/properties correlations in other conformationally flexible molecule
Stoichiometric analysis of self-maintaining metabolisms

This paper presents an extension of stoichiometric analysis in systems where the catalytic compounds (enzymes) are also intermediates of the metabolic network (dual property), so they are produced and degraded by the reaction network itself. To take this property into account, we introduce the definition of enzyme-maintaining mode, a set of reactions that produces its own catalyst and can operate at stationary state. Moreover, an enzyme-maintaining mode is defined as elementary with respect to a given reaction if the removal of any of the remaining reactions causes the cessation of any steady state flux through this reference reaction. These concepts are applied to determine the network structure of a simple self-maintaining system
Symbol Extraction Method and Symbolic Distance for Analysing Medical Time Series

The analysis of time series databases is very important in the area of medicine. Most of the approaches that address this problem are based on numerical algorithms that calculate distances, clusters, index trees, etc. However, a symbolic rather than numerical analysis is sometimes needed to search for the characteristics of the time series. Symbolic information helps users to efficiently analyse and compare time series in the same or in a similar way as a domain expert would. This paper focuses on the process of transforming numerical time series into a symbolic domain and on the definition of both this domain and a distance for comparing symbolic temporal sequences. The work is applied to the isokinetics domain within an application called I4
Animal performance and fatty acid composition of lambs fed with different vegetable oils.

Twenty-seven lambs were used to investigate the effects of the inclusion of 4% hydrogenated palm oil (HPO) or sunflower oil (SFO) in the concentrate on animal performance, carcass and meat quality and fat characteristics and fatty acid composition. Animals (16.2 ± 0.27 kg initial weight) were fed concentrate (Control, HPO or SFO) and barley straw ad libitum and slaughtered at 25 kg. SFO lambs tended to eat less concentrate than HPO animals (P < 0.10). Neither HPO nor SFO affected any of the carcass characteristics studied, meat pH and meat and fat colour (P > 0.05). SFO decreased proportions of C16:0, C18:1 cis-11 and C18:3 (P < 0.05) and increased C18:1 trans (P < 0.001) and C18:2/C18:3 ratio (P < 0.05). Atherogenicity index was lower (P < 0.05) when SFO was included in the concentrate. HPO did not affected and SFO improved fatty acid composition of fattening lambs without affecting animal performance
Object Kinetic Monte Carlo calculations of irradiated Fe-Cr dilute alloys: The effect of the interaction radius between substitutional Cr and self-interstitial Fe

ObjectKineticMonteCarlo models allow for the study of the evolution of the damage created by irradiation to time scales that are comparable to those achieved experimentally. Therefore, the essential ObjectKineticMonteCarlo parameters can be validated through comparison with experiments. However, this validation is not trivial since a large number of parameters is necessary, including migration energies of point defects and their clusters, binding energies of point defects in clusters, as well as the interactionradii. This is particularly cumbersome when describing an alloy, such as the Fe–Cr system, which is of interest for fusion energy applications. In this work we describe an ObjectKineticMonteCarlo model for Fe–Cr alloys in the dilute limit. The parameters used in the model come either from density functional theory calculations or from empirical interatomic potentials. This model is used to reproduce isochronal resistivity recovery experiments of electron irradiateddiluteFe–Cr alloys performed by Abe and Kuramoto. The comparison between the calculated results and the experiments reveal that an important parameter is the capture radius between substitutionalCr and self-interstitialFe atoms. A parametric study is presented on the effect of the capture radius on the simulated recovery curves
The new challenges of end-of-life tyres management systems: a Spanish case study

Directive 2008/98/EC released by the European Union represents a significant step forward in all relevant aspects of waste management. Under the already established, extended produced responsibility (EPR) principle, new policies have been enunciated to continuously achieve better overall environmental performance of key products throughout their life phases. This paper discusses how the directive is being articulated in Spain by the main integrated management system (IMS) for end-of-life (EOL) tyres since its creation in 2006. Focusing on the IMS technological, economic and legal aspects, the study provides a global perspective and evaluation of how the IMS is facing the current issues to resolve, the new challenges that have appeared and the management vision for the coming years
Dielectric behaviour of Hf-doped CaCu3Ti4O12 ceramics obtained by conventional synthesis and reactive sintering

CaCu3(Ti4xHfx)O12 ceramics (JC = 0.04, 0.1 and 0.2) were prepared by conventional synthesis (CS) and through reactive sintering (RS), in which  synthesis and sintering of the material take place in one single step. The microstructure and the dielectric properties of Hf-doped CCTO (CCTOHf)  have been studied by XRD, FE-SEM, AFM, Raman and impedance spectroscopy (IS) in order to correlate the structure, microstructure and the  electrical properties. Samples prepared by reactive sintering show slightly higher dielectric constant than those prepared by conventional synthesis  in the same way than the pure CCTO. Dielectric constant and dielectric losses decrease slightly increasing Hf content. For CCTOHf ceramics  with x> 0.04 for CS and x> 0.1 for RS, a secondary phase HfTi04 appears. As expected, the reactive sintering processing method allows a higher  incorporation of Hf in the CCTO lattice than the conventional synthesis one
Parallel workflows to personalize clinical guidelines recommendations: application to gestational diabetes mellitus

The MobiGuide system provides patients with personalized decision support tools, based on computerized clinical guidelines, in a mobile environment. The generic capabilities of the system will be demonstrated applied to the clinical domain of Gestational Diabetes (GD). This paper presents a methodology to identify personalized recommendations, obtained from the analysis of the GD guideline. We added a conceptual parallel part to the formalization of the GD guideline called "parallel workflow" that allows considering patient?s personal context and preferences. As a result of analysing the GD guideline and eliciting medical knowledge, we identified three different types of personalized advices (therapy, measurements and upcoming events) that will be implemented to perform patients? guiding at home, supported by the MobiGuide system. These results will be essential to determine the distribution of functionalities between mobile and server decision support capabilities
In situ analysis of the tensile deformation mechanisms in extruded Mg–1Mn–1Nd (wt%)

An extruded Mg–1Mn–1Nd (wt%) (MN11) alloy was tested in tension in an SEM at temperatures of 323K (50°C), 423 K (150°C), and 523 K (250°C) to analyse the local deformation mechanisms through in situ observations. Electron backscatter diffraction was performed before and after the deformation. It was found that the tensile strength decreased with increasing temperature, and the relative activity of different twinning and slip systems was quantified. At 323K (50C), extension twinning, basal, prismatic (a) and pyramidal (c+a) slip were active. Much less extension twinning was observed at 423K (150ºC) while basal slip and prismatic (a) slip were dominant and presented similar activities. At 523K (250ºC), twinning was not observed, and basal slip controlled the deformation
The Boarding Control System: Modelling and Control of a Surface Effect Ship for improved accessibility to Offshore Wind Turbines

The main contribution of this thesis is to introduce a control system that enables
access to offshore wind turbines for operation and maintenance (O&M) in higher
sea states than what is possible today, while maintaining an acceptable level of
risk. The system is implemented on-board on a Surface Effect Ship (SES) which
introduces a new craft-concept to the turbine transfer vessels. Catamarans and
Small-water-area twin hulls (SWATHs) are currently dominating the market.
The control system is denoted the Boarding Control System (BCS) which is
a control algorithm that utilizes certain sensors and hardware to control air- ow
actuators on a SES. The controlled actuators regulates the air cushion pressure to
counteract, and compensate against, the vessel motions set up by sea wave propagations.
Hence, we perform motion damping in the vertical plane which ultimately
improves the accessibility to wind turbines.
The work presented in this thesis influenced the decision to build two vessels of
the Wave Craft class, build no. 21 and 22 by Umoe Mandal. The prototype, Umoe
Ventus, is currently operating at Borkum Riffgrund 1, a wind-farm in the German
sector of the North Sea.
The SES-dynamics related to the BCS is mathematically modelled and a controller
is designed. Stability investigations are performed and system performance
are given through simulation, model- and full-scale experimental testing.
The performance of the BCS proves that accessibility to offshore-structures is
possible in higher seas compared to the case where the system is inactive. Today
it is possible to access turbines in up to 1:5 - 1:75m signifcant wave height (Hs).
The SES with the BCS is tested in up to 2m Hs with no sign of reduced safety for
offshore personnel while boarding a turbine. The model-test results indicates that
access is possible in up to 2:5m Hs and at least 3:2m in long-crested seas (Section
2.5)
The Evolution of Vagueness

Vague predicates, those that exhibit borderline cases, pose a persistent problem for philosophers and logicians. Although they are ubiquitous in natural language, when used in a logical context, vague predicates lead to contradiction. This paper will address a question that is intimately related to this problem. Given their inherent imprecision, why do vague predicates arise in the first place?  \ud
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I discuss a variation of the signaling game where the state space is treated as contiguous, i.e., endowed with a metric that captures a similarity relation over states. This added structure is manifested in payoffs that reward approximate coordination between sender and receiver as well as perfect coordination.  I evolve these games using a variation of Herrnstein reinforcement learning that better reflects the generalizing learning strategies real-world actors use in situations where states of the world are similar. In these simulations, signaling can develop very quickly, and the signals are vague in much the way ordinary language predicates are vague --- they each exclusively apply to certain items, but for some transition period both signals apply to varying degrees. Moreover, I show that under certain parameter values, in particular when state spaces are large and time is limited, learning generalization of this sort yield strategies with higher payoffs than standard Herrnstein reinforcement learning. \ud
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These models may then help explain why the phenomenon of vagueness arises in natural language: the learning strategies that allow actors to quickly and effectively develop signaling conventions in contiguous state spaces make it unavoidable. \u
Use of STATCOM in wind farms with fixed-speed generators for grid code compliance

The increasing penetration of wind energy into power systems has pushed grid operators to set new requirements for this kind of generating plants in order to keep acceptable and reliable operation of the system. In addition to the low voltage ride through capability, wind farms are required to participate in voltage support, stability enhancement and power quality improvement. This paper presents a solution for wind farms with fixed-speed generators based on the use of STATCOM with braking resistor and additional series impedances, with an adequate control strategy. The focus is put on guaranteeing the grid code compliance when the wind farm faces an extensive series of grid disturbances
Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier

The precise control and stabilization of magnetic domain walls is key for the development of the next generation magnetic nano-devices. Among the multitude of magnetic configurations of a magnetic domain wall, topologically protected states are of particular interest due to their intrinsic stability. In this work, using XMCD-PEEM, we have observed a topologically protected magnetic domain wall in a ferromagnetic cylindrical nanowire. Its structure is stabilized by periodic sharp alterations of the chemical composition in the nanowire. The large stability of this topologically protected domain wall contrasts with the mobility of other non-protected and non-chiral states also present in the same nanowire. The micromagnetic simulations show the structure and the conditions required to find the topologically protected state. These results are relevant for the design of future spintronic devices such as domain wall based RF oscillators or magnetic memories
Crystal Structure of the VV Dimer [V2O2(μ-O)(dmpp)2(OCH3)2] and Its Equilibrium with the VV Trimer [V3O3(μ-O)3(dmpp)3(H2O)](H2O)2 in Methanol/Water Solutions

The behaviour of the cyclic trimeric VV complex [V3O3(μ-O)3(dmpp)3(H2O)](H2O)2, V3L3, (L = Hdmpp = 3-hydroxy-1,2-dimethyl-4-pyridinone) was studied in methanol and methanol/water solutions by using 51V and 1D- and 2D 1H NMR spectroscopy. Red crystals, isolated from a highly concentrated methanol solution of the trimeric complex, were analysed by X-ray crystallography. The solid-state structure of the compound showed the presence of a new dinuclear VV cluster and allowed for its formulation as a [V2O2(μ-O)(dmpp)2(OCH3)2] complex, V2Y2L2 (Y = OCH3). This complex crystallises in the monoclinic system: P21/c, a = 8.4573(11) Å, b = 15.034(2) Å and c = 15.849(2) Å, β = 105.300(2)°, V = 1943,7(4) Å3, Z = 2, and R1(wR2) = 0.0492(0.1706). The trimer V3L3 complex dissolved in a dry methanol solution fully decomposes, as shown by the 51V NMR signals at -388, -450 and -551 ppm, which are assigned to a monomer complex [VO(OMe)(dmpp)2] (VYL2), the dimer V2Y2L2 and the monomethyl ester of monovanadate, V1Y (V1 = monovanadate; Y = OCH3), respectively. In methanol/water solutions, a new 51V NMR signal appears at delta = -492 ppm, which is assigned to the [VO2(dmpp)(H2O)2] (VL) complex. When the percentage of water in the mixture increases, the relative intensities of the V2Y2L2 and V1Y signals decrease sharply, and a broad signal at -488 ppm appears, corresponding to the original VV trimer complex, which is the only species present in 94 % water. A temperature-dependent 1H NMR study of a CD3OD solution of V3L3 confirmed the presence, at room temperature, of the dinuclear V2L2 complex and the VL2 species. At temperatures below 0 °C down to -50 °C, the appearance of new signals reflects the presence of isomers for the V2Y2L2 and VYL2 species with different stabilities and symmetries. 2D 1H homonuclear NMR exchange experiments (EXSY) allowed us to establish the isomeric equilibria that take place in solution, and indicates intramolecular exchange between the two ligands of the major isomer of VYL2 and intermolecular exchange between the major and minor isomers of species of different nuclearity, V2Y2L2 and VYL2. However, no evidence was found for intermolecular exchange between the major isomers and between the minor isomers of species of different nuclearity or between isomers of species of the same nuclearity. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)http://dx.doi.org/10.1002/ejic.20060030
Control charts: a cost-optimization approach for processes with random shifts

In this paper we describe an approach for establishing control limits and sampling times which derives from economic performance criteria and a model for random shifts. The total cost related to both production and control is calculated, based on cost estimates for false alarms, for not identifying a true out of control situation, and for obtaining a data record through sampling. We describe the complete process for applying the method and compare with conventional procedures to real data from a Portuguese pulp and paper industrial plant. It turns out that substantial cost-reductions may be obtained. Copyright © 2004 John Wiley & Sons, Ltd.http://dx.doi.org/10.1002/asmb.52