Cauchy distributions for the integrable standard map

We consider the integrable (zero perturbation) two--dimensional standard map, in light of current developments on ergodic sums of irrational rotations, and recent numerical evidence that it might possess non-trivial q-Gaussian statistics. Using both classical and recent results, we show that the phase average of the sum of centered positions of an orbit, for long times and after normalization, obeys the Cauchy distribution (a q-Gaussian with q=2), while for almost all individual orbits such a sum does not obey any distribution at all. We discuss the question of existence of distributions for KAM tori.Comment: 6 pages, 2 figure

Fem and analytical modeling of the incipient chip formation for the generation of micro-features

This paper explores the modeling of incipient cutting by Abaqus, LS-Dyna, and Ansys Finite Element Methods (FEMs), by comparing also experimentally the results on different material classes, including common aluminum and steel alloys and an acetal polymer. The target application is the sustainable manufacturing of gecko adhesives by micromachining a durable mold for injection molding. The challenges posed by the mold shape include undercuts and sharp tips, which can be machined by a special diamond blade, which enters the material, forms a chip, and exits. An analytical model to predict the shape of the incipient chip and of the formed grove as a function of the material properties and of the cutting parameters is provided. The main scientific merit of the current work is to approach theoretically, numerically, and experimentally the very early phase of the cutting tool penetration for new sustainable machining and micro-machining processes

GROWTH AND YIELDS OF 'ARBEQUINA' HIGH-DENSITY PLANTING SYSTEMS IN THREE DIFFERENT OLIVE GROWING AREAS IN ITALY

The sustainability of the traditional olive-growing sector in EU countries characterised by high production costs and a low selling price for the oil was mainly determined by EU subsidies available for the sector. With the opening of the free trade area by the Barcellona Declaration of 1995 and a cut in EU subsidies in 2014, crucial changes in the sector are now needed. In order to increase the competitiveness of EU olive production, attention should be given to new high-yielding and mechanized cultivation systems. In the 1990s, Spain introduced new high-density planting systems (1,200-2,000 trees/ha) using three low-vigour and early-fruiting cultivars ( Arbequina , Arbosana and Koroneiki ). Italian olive production lies in a geographical area that stretches for about 6\ub0 in latitude (37-43\ub0 latitude N) and in the band of altitude which ranges from sea level to 400 m a.s.l. Studies on the ecophysiology of woody plants show the importance of adapting the planting system to the climate of the cultivation site, particularly for high-density groves. The evaluation of cultivars suitable for high-density systems, based on their vegetative characteristics, branching and fruiting, together with an analysis of product quality, may contribute significantly to the development and diffusion of new crop growing systems. To achieve this aim, joint research was carried out by three different research units operating in the three main olive-growing regions of Italy (Sicily, Apulia and Umbria). This paper illustrates the first results (2010 and 2011) obtained by the PRIN Project on Biological processes and environmental factors affecting the vegetative growth, fruiting and oil quality control in a high density olive (Olea europaea L.) planting system

Quantum Computing of Poincare Recurrences and Periodic Orbits

Quantum algorithms are built enabling to find Poincar\'e recurrence times and periodic orbits of classical dynamical systems. It is shown that exponential gain compared to classical algorithms can be reached for a restricted class of systems. Quadratic gain can be achieved for a larger set of dynamical systems. The simplest cases can be implemented with small number of qubits.Comment: revtex, 5 pages, research at Quantware MIPS Center (see http://www.quantware.ups-tlse.fr); minor changes and references adde

Resposta de aveia à adubação, em dois sistemas de plantio.

O objetivo deste trabalho foi determinar para a linhagem de aveia UPF 87111, a dose de NPK que possibilite obter máxima produção e qualidade de forragem, em dois sistemas de plantio: convencional e cobertura morta. O delineamento experimental foi fatorial fracionado tipo (1/2)43 com dois blocos ao acaso, um total de 32 parcelas sem repetição. Os tratamentos foram quatro doses de N e de K2O (0,70,140 e 210 Kg ha-1), na forma de uréia e de cloreto de potássio e quatro doses de N e K2O (0,70,140 e 210 kg ha-1), na forma de ureia e de cloreto de potássio e quatro doses de P (0,60, 120, 180 kg ha-1 de P2O5), como super fosfato triplo. Nos dois sistemas de plantio a resposta ao nitrogênio apresentou o maior retorno em produção de forragem por unidade de nutriente aplicado. Embora no plantio com cobertura morta a aplicado. Embora no plantio com cobertura morta a eficiência do N tenha sido menor, provavelmente devido a sua imobilização parcial pela palhada, o potencial de produção foi 26% superior ao do plantio convencional

Sex differences in risk factors for oral and pharyngeal cancer among Puerto Rican adults

Background: Oral and pharyngeal cancer (OPC) is a frequent type of cancer in Puerto Rico, with the risk being higher in men relative to women. We assessed differences in OPC risk factors implicated in these sex disparities. Methods: We analyzed data of 740 adult participants (40-65 years) from the San Juan Overweight Adults Longitudinal Study (SOALS). A comprehensive questionnaire was administered to collect information on sociodemographic characteristics, cigarette smoking, binge drinking, oral high-risk HPV infection, fruit and vegetable consumption, sexual behavior, and oral hygiene practices. A full-mouth periodontal examination was also performed. Sixteen OPC known and potential risk factors were evaluated. Crude and adjusted prevalence ratio (PR) estimates for individual OPC risk factors, by sex, were calculated using log-binomial regression. Results: Compared to women, men had significantly increased prevalence of several OPC risk factors including current smoking (PR: 1.91, 95% Confidence interval [CI]: 1.35-2.70), binge drinking (PR: 1.92, 95% CI: 1.31-2.84), and severe periodontitis (PR: 2.05, 95% CI: 1.47-2.85). Conclusions: Men were significantly more likely than women to have risk factors for OPC. Cancer prevention and control efforts should focus on sex-specific interventions that help reduce this disparity

Geometric representation of interval exchange maps over algebraic number fields

We consider the restriction of interval exchange transformations to algebraic number fields, which leads to maps on lattices. We characterize renormalizability arithmetically, and study its relationships with a geometrical quantity that we call the drift vector. We exhibit some examples of renormalizable interval exchange maps with zero and non-zero drift vector, and carry out some investigations of their properties. In particular, we look for evidence of the finite decomposition property: each lattice is the union of finitely many orbits.Comment: 34 pages, 8 postscript figure

O cultivo de Trigo de Duplo Propósito e os efeitos da adubação nitrogenada na produção de biomassa e grãos.

O sistema de cultivo de Trigo de Duplo Propósito (TDP) utiliza cultivares para a produção de grãos e forragem (visando o consumo animal) proporcionando ao triticultor um adicional à sua renda. A adubação nitrogenada é essencial, nesse sistema para aumentar a eficiência o trigo (planta C3) na produção de biomassa. Esse trabalho teve por objetivo avaliar a resposta do cultivar Frontana ao sistema de TDP e às diferentes doses de adubação nitrogenada, bem como, quantificar a sua produção de grãos e de forragem e analisar o rendimento econômico gerado nesse sistema. O delineamento experimental utilizado foi o de blocos ao acaso com parcelas subdivididas tendo quatro blocos, quatro tratamentos nas parcelas (Doses de N: 0, 60, 90 e 120 kg/ha) e cinco nas subparcelas (Cortes: 1 a 4). Em cada dose de N, dentro de cada corte, a produtividade de grãos não foi afetada. A forragem do cultivar estudado apresentou maior rentabilidade econômica no sistema TDP, com a realização de um corte e a aplicação de 60 Kg de N/ha seguida de aplicação de 90 Kg de N/ha, a produção exclusiva de grãos teve maior rentabilidade com a adição de 120 Kg de N/ha

Treated Unconventional Waters Combined with Different Irrigation Strategies Affect 1 H NMR Metabolic Profile of a Monovarietal Extra Virgin Olive Oil

none8noThe agricultural sector is facing a decrease in water supply and water quality at a global level and this is a problem that strictly affects all the Mediterranean olive growing areas. The aim of this work was to evaluate, for the first time, by NMR Spectroscopy and multivariate data analysis the metabolic profiling of the oils produced under different irrigation schemes. Arbosana olive oils were obtained from the use of saline reclaimed water (RW) and treated municipal wastewater (DW), combined with: full irrigation (FI) and regulated deficit irrigation (RDI). The results show a higher relative content of saturated fatty acids in EVOOs obtained from RDI strategy, regardless of the water source. Moreover, an increase in unsaturated fatty acids, a ω6/ω3 ratio content was observed in EVOOs obtained from RW when compared with DW water. Furthermore, the RW–RDI showed an increase in secoiridoid derivatives and hydroperoxides with respect to DW–RDI. A sustainable irrigation management, by combining a deficit irrigation strategy and saline reclaimed water source, could be crucial in order to overcome the problem of water scarcity and to guarantee the olive oil nutraceutical properties. The1 H NMR-based metabolomic approach proved a powerful and versatile tool for this specific investigation.openAngile F.; Vivaldi G.A.; Girelli C.R.; Del Coco L.; Caponio G.; Lopriore G.; Fanizzi F.P.; Camposeo S.Angile, F.; Vivaldi, G. A.; Girelli, C. R.; Del Coco, L.; Caponio, G.; Lopriore, G.; Fanizzi, F. P.; Camposeo, S

Sweat analysis with a wearable sensing platform based on laser-induced graphene

The scientific community has shown increasing interest in laser scribing for the direct fabrication of conductive graphene-based tracks on different substrates. This can enable novel routes for the noninvasive analysis of biofluids (such as sweat or other noninvasive matrices), whose results can provide the rapid evaluation of a person's health status. Here, we present a wearable sensing platform based on laser induced graphene (LIG) porous electrodes scribed on a flexible polyimide sheet, which samples sweat through a paper sampler. The device is fully laser manufactured and features a two layer design with LIG-based vertical interconnect accesses. A detailed characterization of the LIG electrodes including pore size, surface groups, surface area in comparison to electroactive surface area, and the reduction behavior of different LIG types was performed. The bare LIG electrodes can detect the electrochemical oxidation of both uric acid and tyrosine. Further modification of the surface of the LIG working electrode with an indoaniline derivative [4-((4-aminophenyl)imino)-2,6-dimethoxycyclohexa-2,5-dien-1-one] enables the voltammetric measurement of pH with an almost ideal sensitivity and without interference from other analytes. Finally, electrochemical impedance spectroscopy was used to measure the concentrations of ions through the analysis of the sweat impedance. The device was successfully tested in a real case scenario, worn on the skin during a sports session. In vitro tests proved the non-cytotoxic effect of the device on the A549 cell line