1,959 research outputs found
Association between functional fitness and overweight in elderly women
The purpose of this study was to verify the association between functional fitness (FF) and excessive fatness (EF) in aged women. Three hundred ninety four women, averaged 69.4 years of age (DP = 3.4 years), participated in the study. FF was measured by means of a battery of motor tests. EF was determined by corporal mass and height measurements. FF was compared with AAHPERD normative values. Chi-square test (p < .05) was applied in order to verify an association between FF and EF. EF prevalence was 46.5% and there was an association (p < .05) between the index of functional aptitude (IAFG) and EF. Among those with EF, 87.8% presented a weak IAFG. EF was associated with a 5.07 (IC 95% = 3.12 – 7.14) times greater chance of lower FF. Results point to the conclusion that morphologic condition (EF) needs to be considered in evaluating FF in aged women
Detecting the Cold Spot as a Void with the Non-Diagonal Two-Point Function
The anomaly in the Cosmic Microwave Background known as the "Cold Spot" could
be due to the existence of an anomalously large spherical (few hundreds Mpc/h
radius) underdense region, called a "Void" for short. Such a structure would
have an impact on the CMB also at high multipoles l through Lensing. This would
then represent a unique signature of a Void. Modeling such an underdensity with
an LTB metric, we show that the Lensing effect leads to a large signal in the
non-diagonal two-point function, centered in the direction of the Cold Spot,
such that the Planck satellite will be able to confirm or rule out the Void
explanation for the Cold Spot, for any Void radius with a Signal-to-Noise ratio
of at least O(10).Comment: v1: 6 pages, 2 figures; v2: 6 pages, 2 figures, text improved, to
appear on JCA
Efecto de algunas dinitroanilinas sobre la nodulación de la soya (Glycine max (L) Merr).
Se evaluó el comportamiento de algunas dinitroanilinas, usadas en el control de malezas en soya, nodulación, producción de materia verde, concentración de N en el follaje y rendimiento de grano. Los principales objetivos fueron determinar la posible influencia que estos herbicidas pudieran tener en la actividad del Rhizobium japonicum. La evaluación se hizo en plena floración, 40 dÃas después de la siembra en la variedad ICA-TunÃa. Se utilizaron diferentes dosis aplicadas como presiembra incorporado ó preemergente. En la parcela testigo no se aplicó ningún producto y se desyerbó mecánicamente. Se emplearon bloques al azar con 3 replicaciones. Durante 2 años se cuantificó el peso seco de los nódulos, el peso seco de las plantas, la concentración de N foliar y rendimiento de grano. Se hizo un análisis de varianza combinado de los 2 años y la prueba de Diferencia MÃnima Significativa. Se encontró que Butralina, Dinitramina y Vernolate no afectan la nodulación pero sà disminuyen el rendimiento. Pendimetalina y Trifluralina reducen tanto la nodulación como el rendimiento. Orizalina es el herbicida que más reduce la nodulación, pero no reduce el rendimiento. Ninguno de los herbicidas afectó la producción de materia seca, de follaje ni el porcentaje de N en la parte aérea de la planta. Estos herbicidas a pesar de reducir el rendimiento, controlan las malezas, por tanto el agricultor puede decidir entre tener buen control quÃmico de malezas, disminuyendo un poco el rendimiento o escoger otro método de controlSoya-Soja- Glycine ma
Chromomagnetic Dipole Moment of the Top Quark Revisited
We study the complete one-loop contributions to the chromagnetic dipole
moment of the top quark in the Standard Model, two Higgs doublet
models, topcolor assited technicolor models (TC2), 331 models and extended
models with a single extra dimension. We find that the SM predicts
and that the predictions of the other models are also
consitent with the constraints imposed on by low-energy
precision measurements.Comment: 20 pages, 5 figures, Updat
Janus II: a new generation application-driven computer for spin-system simulations
This paper describes the architecture, the development and the implementation
of Janus II, a new generation application-driven number cruncher optimized for
Monte Carlo simulations of spin systems (mainly spin glasses). This domain of
computational physics is a recognized grand challenge of high-performance
computing: the resources necessary to study in detail theoretical models that
can make contact with experimental data are by far beyond those available using
commodity computer systems. On the other hand, several specific features of the
associated algorithms suggest that unconventional computer architectures, which
can be implemented with available electronics technologies, may lead to order
of magnitude increases in performance, reducing to acceptable values on human
scales the time needed to carry out simulation campaigns that would take
centuries on commercially available machines. Janus II is one such machine,
recently developed and commissioned, that builds upon and improves on the
successful JANUS machine, which has been used for physics since 2008 and is
still in operation today. This paper describes in detail the motivations behind
the project, the computational requirements, the architecture and the
implementation of this new machine and compares its expected performances with
those of currently available commercial systems.Comment: 28 pages, 6 figure
Stability analysis of f(R)-AdS black holes
We study the stability of f(R)-AdS (Schwarzschild-AdS) black hole obtained
from f(R) gravity. In order to resolve the difficulty of solving fourth order
linearized equations, we transform f(R) gravity into the scalar-tensor theory
by introducing two auxiliary scalars. In this case, the linearized curvature
scalar becomes a dynamical scalaron, showing that all linearized equations are
second order. Using the positivity of gravitational potentials and S-deformed
technique allows us to guarantee the stability of f(R)-AdS black hole if the
scalaron mass squared satisfies the Breitenlohner-Freedman bound. This is
confirmed by computing quasinormal frequencies of the scalaron for large
f(R)-AdS black hole.Comment: 17 pages, 1 figure, version to appear in EPJ
Nature of the spin-glass phase at experimental length scales
We present a massive equilibrium simulation of the three-dimensional Ising
spin glass at low temperatures. The Janus special-purpose computer has allowed
us to equilibrate, using parallel tempering, L=32 lattices down to T=0.64 Tc.
We demonstrate the relevance of equilibrium finite-size simulations to
understand experimental non-equilibrium spin glasses in the thermodynamical
limit by establishing a time-length dictionary. We conclude that
non-equilibrium experiments performed on a time scale of one hour can be
matched with equilibrium results on L=110 lattices. A detailed investigation of
the probability distribution functions of the spin and link overlap, as well as
of their correlation functions, shows that Replica Symmetry Breaking is the
appropriate theoretical framework for the physically relevant length scales.
Besides, we improve over existing methodologies to ensure equilibration in
parallel tempering simulations.Comment: 48 pages, 19 postscript figures, 9 tables. Version accepted for
publication in the Journal of Statistical Mechanic
Effect of gamma radiation of 60Co on sunflower plants (Helianthus annuus L.) (Asteraceae), from irradiated achenes
In order to know the effect of 60Co gamma irradiation, in the sunflower crop, were irradiated achenes in the Transelektro LGI-01 in the Instituto Nacional de Investigaciones Nucleares. The data was evaluated under a completely randomized design, where the treatments were 0, 100, 200, 300, 400, 500, 600, 700, 800 and 900 Gy and four repetitions (10x4) = 40 experimental units. The response variables were: plant height, root length and volume, dry biomass. The results indicated that germination and sprouting decreased as the radiation increased, adjusting these to a quadratic model. Plant height, length, root volume and dry biomass decreased at high doses. From this investigation it was concluded, that doses of 100 and 200 Gy, have a stimulating effect on plant height and root length, being an important agent, to induce genetic variability in sunflower
Technical and economic pre-feasibility study for the construction of septic tank-filter-sinkhole with alternative material
Received: February 2nd, 2021 ; Accepted: August 3rd, 2021 ; Published: August 24th, 2021 ; Correspondence: [email protected] study of the different materials used in the construction of septic tanks aims to
facilitate and spread the use of this sewage treatment system in places that are not assisted by
municipal sewage systems and in the rural area, which despite having a smaller number of
inhabitants compared to the urban area This study aims to carry out a technical and economic
evaluation of the concrete and tires using in the construction of septic tanks-filter-sinkhole. The
wastewater treatment systems were built according to the recommendations in NBR 7229/93 and
13969/97. To evaluate the efficiency of each system built, the following parameters were
analyzed: chemical oxygen demand (COD), the potential of hydrogen (pH), alkalinity, acidity,
and temperature. In the economic evaluation, the materials and labor required to install the
systems were considered using the Brazilian cost database (SINAPI), and an economic and
financial feasibility study was carried out. According to the technical and economic analysis of
construction, both systems showed the same technical performance, however, the concrete design
proved to be more advantageous than the tire design, considering the difficulty in acquiring the
tires and the high cost if it is necessary to buy them, in addition to the greater difficulty in handling
and installing the tire system compared to the concrete one
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